What causes this bloom with an old telephoto lens?How do soft focus or defocus control rings work?Besides...
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What causes this bloom with an old telephoto lens?
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I recently got a Görlitz-Meyer Optik Telemegor 250mm F5.5
I am using this telephoto-lens on my Sony a6300 APS-C camera and I like it.
The problem I currently have is, that I get a lot of "bloom" in my pictures.
This lets my subjects appear glowing, like this dove flying away.
While being quite a neat effect, I would like to know, if this is a optical limitation or if it can be caused by dust inside the lens ? (like bacteria growing to fungus)
artifacts telephoto
edited 8 hours ago
mattdm
126k40 gold badges372 silver badges673 bronze badges
asked 13 hours ago
Hannes HauptmannHannes Hauptmann
183 bronze badges
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Hannes Hauptmann is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I recently got a Görlitz-Meyer Optik Telemegor 250mm F5.5
I am using this telephoto-lens on my Sony a6300 APS-C camera and I like it.
The problem I currently have is, that I get a lot of "bloom" in my pictures.
This lets my subjects appear glowing, like this dove flying away.
While being quite a neat effect, I would like to know, if this is a optical limitation or if it can be caused by dust inside the lens ? (like bacteria growing to fungus)
artifacts telephoto
edited 8 hours ago
mattdm
126k40 gold badges372 silver badges673 bronze badges
asked 13 hours ago
Hannes HauptmannHannes Hauptmann
183 bronze badges
New contributor
Hannes Hauptmann is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I recently got a Görlitz-Meyer Optik Telemegor 250mm F5.5
I am using this telephoto-lens on my Sony a6300 APS-C camera and I like it.
The problem I currently have is, that I get a lot of "bloom" in my pictures.
This lets my subjects appear glowing, like this dove flying away.
While being quite a neat effect, I would like to know, if this is a optical limitation or if it can be caused by dust inside the lens ? (like bacteria growing to fungus)
artifacts telephoto
edited 8 hours ago
mattdm
126k40 gold badges372 silver badges673 bronze badges
asked 13 hours ago
Hannes HauptmannHannes Hauptmann
183 bronze badges
New contributor
Hannes Hauptmann is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I recently got a Görlitz-Meyer Optik Telemegor 250mm F5.5
I am using this telephoto-lens on my Sony a6300 APS-C camera and I like it.
The problem I currently have is, that I get a lot of "bloom" in my pictures.
This lets my subjects appear glowing, like this dove flying away.
While being quite a neat effect, I would like to know, if this is a optical limitation or if it can be caused by dust inside the lens ? (like bacteria growing to fungus)
artifacts telephoto
artifacts telephoto
edited 8 hours ago
mattdm
126k40 gold badges372 silver badges673 bronze badges
asked 13 hours ago
Hannes HauptmannHannes Hauptmann
183 bronze badges
New contributor
Hannes Hauptmann is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 8 hours ago
mattdm
126k40 gold badges372 silver badges673 bronze badges
asked 13 hours ago
Hannes HauptmannHannes Hauptmann
183 bronze badges
New contributor
Hannes Hauptmann is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 8 hours ago
mattdm
126k40 gold badges372 silver badges673 bronze badges
edited 8 hours ago
mattdm
126k40 gold badges372 silver badges673 bronze badges
edited 8 hours ago
mattdm
126k40 gold badges372 silver badges673 bronze badges
126k40 gold badges372 silver badges673 bronze badges
asked 13 hours ago
Hannes HauptmannHannes Hauptmann
183 bronze badges
New contributor
Hannes Hauptmann is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 13 hours ago
Hannes HauptmannHannes Hauptmann
183 bronze badges
asked 13 hours ago
Hannes HauptmannHannes Hauptmann
183 bronze badges
183 bronze badges
New contributor
Hannes Hauptmann is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Hannes Hauptmann is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
2 Answers
2
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votes
It appears this is somewhat typical of the MOG 250 mm lens. Based on examples at Flickr and elsewhere, the lens exhibits characteristic ring-shaped or bubble background bokeh, and dreamy haze at the plane of focus (especially when shooting wide open aperture). It's possible your copy of the lens exaggerates the effect — all lenses of a particular make/model exhibit copy-to-copy variations — and it's possible the effect could be exacerbated by dust in the lens. But the presence of the effect itself is due to the design of the lens.
If dust is a factor, it appears the lens is fairly easy to disassemble and clean, if you're inclined to tackle that yourself.
This reminds me of the adjustable effect on Nikon's DC 105mm ƒ/2 and DC 135mm ƒ/2 lenses (DC = "defocus control"). Those lenses allow a degree of control over the quality of the bokeh (with an inverse relationship on the foreground bokeh). The effects of the MOG 250mm appear similar to one of the Nikon DC lenses set to rear defocus, which causes positive spherical aberration. From jrista's answer to the question, How do soft focus or defocus control rings work?,
(Reference: David Pinkerton @ Flickr)
The above image was taken with the Nikkor 135mm f/2 lens with defocus control, set to REAR f/4. Note the dreamy effect of highlights right around the plane of focus, and the ringed background bokeh. Both are effects of positive spherical aberration caused by the brighter edges and darker centers of OOF blur circles. Foreground blur will be smooth and creamy without the dreamy effect. For portraits, the same effect can be used to give that dreamy glow to hair, earrings or glasses, anything that produces a bright specular highlight.
answered 10 hours ago
scottbbscottbb
22.4k7 gold badges61 silver badges104 bronze badges
Obviously accepted answer, thank you for your detailed information and topics I can discover, this helped me further !
– Hannes Hauptmann
6 hours ago
add a comment |
Meyer-Optik Görlitz lenses are known for their bubble bokeh. Usually a "glow" or halo, what you describe as "bloom", is also seen in such lenses. Both appear to be associated with spherical aberration. To control them, stop down. Sometimes, only a fraction of a stop is needed.
It is possible for dust, fungus, and haze to cause similar effects. See soft-focus.
answered 8 hours ago
xiotaxiota
17k4 gold badges23 silver badges82 bronze badges
add a comment |
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2 Answers
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2 Answers
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active
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votes
It appears this is somewhat typical of the MOG 250 mm lens. Based on examples at Flickr and elsewhere, the lens exhibits characteristic ring-shaped or bubble background bokeh, and dreamy haze at the plane of focus (especially when shooting wide open aperture). It's possible your copy of the lens exaggerates the effect — all lenses of a particular make/model exhibit copy-to-copy variations — and it's possible the effect could be exacerbated by dust in the lens. But the presence of the effect itself is due to the design of the lens.
If dust is a factor, it appears the lens is fairly easy to disassemble and clean, if you're inclined to tackle that yourself.
This reminds me of the adjustable effect on Nikon's DC 105mm ƒ/2 and DC 135mm ƒ/2 lenses (DC = "defocus control"). Those lenses allow a degree of control over the quality of the bokeh (with an inverse relationship on the foreground bokeh). The effects of the MOG 250mm appear similar to one of the Nikon DC lenses set to rear defocus, which causes positive spherical aberration. From jrista's answer to the question, How do soft focus or defocus control rings work?,
(Reference: David Pinkerton @ Flickr)
The above image was taken with the Nikkor 135mm f/2 lens with defocus control, set to REAR f/4. Note the dreamy effect of highlights right around the plane of focus, and the ringed background bokeh. Both are effects of positive spherical aberration caused by the brighter edges and darker centers of OOF blur circles. Foreground blur will be smooth and creamy without the dreamy effect. For portraits, the same effect can be used to give that dreamy glow to hair, earrings or glasses, anything that produces a bright specular highlight.
answered 10 hours ago
scottbbscottbb
22.4k7 gold badges61 silver badges104 bronze badges
Obviously accepted answer, thank you for your detailed information and topics I can discover, this helped me further !
– Hannes Hauptmann
6 hours ago
add a comment |
It appears this is somewhat typical of the MOG 250 mm lens. Based on examples at Flickr and elsewhere, the lens exhibits characteristic ring-shaped or bubble background bokeh, and dreamy haze at the plane of focus (especially when shooting wide open aperture). It's possible your copy of the lens exaggerates the effect — all lenses of a particular make/model exhibit copy-to-copy variations — and it's possible the effect could be exacerbated by dust in the lens. But the presence of the effect itself is due to the design of the lens.
If dust is a factor, it appears the lens is fairly easy to disassemble and clean, if you're inclined to tackle that yourself.
This reminds me of the adjustable effect on Nikon's DC 105mm ƒ/2 and DC 135mm ƒ/2 lenses (DC = "defocus control"). Those lenses allow a degree of control over the quality of the bokeh (with an inverse relationship on the foreground bokeh). The effects of the MOG 250mm appear similar to one of the Nikon DC lenses set to rear defocus, which causes positive spherical aberration. From jrista's answer to the question, How do soft focus or defocus control rings work?,
(Reference: David Pinkerton @ Flickr)
The above image was taken with the Nikkor 135mm f/2 lens with defocus control, set to REAR f/4. Note the dreamy effect of highlights right around the plane of focus, and the ringed background bokeh. Both are effects of positive spherical aberration caused by the brighter edges and darker centers of OOF blur circles. Foreground blur will be smooth and creamy without the dreamy effect. For portraits, the same effect can be used to give that dreamy glow to hair, earrings or glasses, anything that produces a bright specular highlight.
answered 10 hours ago
scottbbscottbb
22.4k7 gold badges61 silver badges104 bronze badges
Obviously accepted answer, thank you for your detailed information and topics I can discover, this helped me further !
– Hannes Hauptmann
6 hours ago
add a comment |
It appears this is somewhat typical of the MOG 250 mm lens. Based on examples at Flickr and elsewhere, the lens exhibits characteristic ring-shaped or bubble background bokeh, and dreamy haze at the plane of focus (especially when shooting wide open aperture). It's possible your copy of the lens exaggerates the effect — all lenses of a particular make/model exhibit copy-to-copy variations — and it's possible the effect could be exacerbated by dust in the lens. But the presence of the effect itself is due to the design of the lens.
If dust is a factor, it appears the lens is fairly easy to disassemble and clean, if you're inclined to tackle that yourself.
This reminds me of the adjustable effect on Nikon's DC 105mm ƒ/2 and DC 135mm ƒ/2 lenses (DC = "defocus control"). Those lenses allow a degree of control over the quality of the bokeh (with an inverse relationship on the foreground bokeh). The effects of the MOG 250mm appear similar to one of the Nikon DC lenses set to rear defocus, which causes positive spherical aberration. From jrista's answer to the question, How do soft focus or defocus control rings work?,
(Reference: David Pinkerton @ Flickr)
The above image was taken with the Nikkor 135mm f/2 lens with defocus control, set to REAR f/4. Note the dreamy effect of highlights right around the plane of focus, and the ringed background bokeh. Both are effects of positive spherical aberration caused by the brighter edges and darker centers of OOF blur circles. Foreground blur will be smooth and creamy without the dreamy effect. For portraits, the same effect can be used to give that dreamy glow to hair, earrings or glasses, anything that produces a bright specular highlight.
answered 10 hours ago
scottbbscottbb
22.4k7 gold badges61 silver badges104 bronze badges
It appears this is somewhat typical of the MOG 250 mm lens. Based on examples at Flickr and elsewhere, the lens exhibits characteristic ring-shaped or bubble background bokeh, and dreamy haze at the plane of focus (especially when shooting wide open aperture). It's possible your copy of the lens exaggerates the effect — all lenses of a particular make/model exhibit copy-to-copy variations — and it's possible the effect could be exacerbated by dust in the lens. But the presence of the effect itself is due to the design of the lens.
If dust is a factor, it appears the lens is fairly easy to disassemble and clean, if you're inclined to tackle that yourself.
This reminds me of the adjustable effect on Nikon's DC 105mm ƒ/2 and DC 135mm ƒ/2 lenses (DC = "defocus control"). Those lenses allow a degree of control over the quality of the bokeh (with an inverse relationship on the foreground bokeh). The effects of the MOG 250mm appear similar to one of the Nikon DC lenses set to rear defocus, which causes positive spherical aberration. From jrista's answer to the question, How do soft focus or defocus control rings work?,
(Reference: David Pinkerton @ Flickr)
The above image was taken with the Nikkor 135mm f/2 lens with defocus control, set to REAR f/4. Note the dreamy effect of highlights right around the plane of focus, and the ringed background bokeh. Both are effects of positive spherical aberration caused by the brighter edges and darker centers of OOF blur circles. Foreground blur will be smooth and creamy without the dreamy effect. For portraits, the same effect can be used to give that dreamy glow to hair, earrings or glasses, anything that produces a bright specular highlight.
answered 10 hours ago
scottbbscottbb
22.4k7 gold badges61 silver badges104 bronze badges
answered 10 hours ago
scottbbscottbb
22.4k7 gold badges61 silver badges104 bronze badges
answered 10 hours ago
scottbbscottbb
22.4k7 gold badges61 silver badges104 bronze badges
answered 10 hours ago
scottbbscottbb
22.4k7 gold badges61 silver badges104 bronze badges
22.4k7 gold badges61 silver badges104 bronze badges
Obviously accepted answer, thank you for your detailed information and topics I can discover, this helped me further !
– Hannes Hauptmann
6 hours ago
add a comment |
Obviously accepted answer, thank you for your detailed information and topics I can discover, this helped me further !
– Hannes Hauptmann
6 hours ago
Obviously accepted answer, thank you for your detailed information and topics I can discover, this helped me further !
– Hannes Hauptmann
6 hours ago
Obviously accepted answer, thank you for your detailed information and topics I can discover, this helped me further !
– Hannes Hauptmann
6 hours ago
add a comment |
Meyer-Optik Görlitz lenses are known for their bubble bokeh. Usually a "glow" or halo, what you describe as "bloom", is also seen in such lenses. Both appear to be associated with spherical aberration. To control them, stop down. Sometimes, only a fraction of a stop is needed.
It is possible for dust, fungus, and haze to cause similar effects. See soft-focus.
answered 8 hours ago
xiotaxiota
17k4 gold badges23 silver badges82 bronze badges
add a comment |
Meyer-Optik Görlitz lenses are known for their bubble bokeh. Usually a "glow" or halo, what you describe as "bloom", is also seen in such lenses. Both appear to be associated with spherical aberration. To control them, stop down. Sometimes, only a fraction of a stop is needed.
It is possible for dust, fungus, and haze to cause similar effects. See soft-focus.
answered 8 hours ago
xiotaxiota
17k4 gold badges23 silver badges82 bronze badges
add a comment |
Meyer-Optik Görlitz lenses are known for their bubble bokeh. Usually a "glow" or halo, what you describe as "bloom", is also seen in such lenses. Both appear to be associated with spherical aberration. To control them, stop down. Sometimes, only a fraction of a stop is needed.
It is possible for dust, fungus, and haze to cause similar effects. See soft-focus.
answered 8 hours ago
xiotaxiota
17k4 gold badges23 silver badges82 bronze badges
Meyer-Optik Görlitz lenses are known for their bubble bokeh. Usually a "glow" or halo, what you describe as "bloom", is also seen in such lenses. Both appear to be associated with spherical aberration. To control them, stop down. Sometimes, only a fraction of a stop is needed.
It is possible for dust, fungus, and haze to cause similar effects. See soft-focus.
answered 8 hours ago
xiotaxiota
17k4 gold badges23 silver badges82 bronze badges
answered 8 hours ago
xiotaxiota
17k4 gold badges23 silver badges82 bronze badges
answered 8 hours ago
xiotaxiota
17k4 gold badges23 silver badges82 bronze badges
answered 8 hours ago
xiotaxiota
17k4 gold badges23 silver badges82 bronze badges
17k4 gold badges23 silver badges82 bronze badges
add a comment |
add a comment |
Hannes Hauptmann is a new contributor. Be nice, and check out our Code of Conduct.
Hannes Hauptmann is a new contributor. Be nice, and check out our Code of Conduct.
Hannes Hauptmann is a new contributor. Be nice, and check out our Code of Conduct.
Hannes Hauptmann is a new contributor. Be nice, and check out our Code of Conduct.
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