To Kostas, I am so glad that you have done this, it really does help alot as I own one of the Generic anamorphic adapters, and whilst it looks good, upon closer inspection it actually does degrade the image quite alot, especially when I have my lens open at f1.7.
I was wondering, why does the dioptres have to be attached at the front of the anamorphic lens? Why not or have you tried placing it inbetween the Anamorphic and Primes lens?
@ohmss006 Diopters should always be placed in front of the anamorphic in order to enhance sharpness and/or correct chromatic aberrations (achromatic diopters) due to the fixed distance between the concave and convex elements of the anamorphot. Placing a diopter before the anamorphic attachment will not have any effect on correcting such defects. In brief, it would be similar to using a macro lens behind the anamorphot. The resulting image would still be blurry.
@ohmss006 The generic anamorphic adapter gives its best when used with wide angle taking lenses (for instance 24mm).
Still softens the picture, but it is less noticeable since almost everything is in focus.
Some quality +0.5 diopters or a +1 diopter in front of your generic anamorphic adapter will definitely make things a lot lot better for shooting with focal lengths longer than 50mm and at wide apertures. So don't think about it twice!
Hi, thanks for getting back to me adn that was vewry informative as well.
However, I dont quite understand why it has to be infront of the anamorphic lens, because isnt that lens itself causing the bad image quality in the first place? and thus an achromat placed beforehand would correct any of that len's degradation???
Putting the diopter before the anamorphic is wrong because:
1) you don't make your anamorphic focus closer (which is the purpose)
2) you don't correct possible chromatic aberrations of the anamorphic
3) Some anamorphics like the Iscorama need the taking lens to focus always to infinity (and focus only through the anamorphic focus ring). If you put a diopter in front of your taking lens this will never focus to infinity, so you will never get proper focus in your anamorphic system.
To Kostas, I am so glad that you have done this, it really does help alot as I own one of the Generic anamorphic adapters, and whilst it looks good, upon closer inspection it actually does degrade the image quite alot, especially when I have my lens open at f1.7.
I was wondering, why does the dioptres have to be attached at the front of the anamorphic lens? Why not or have you tried placing it inbetween the Anamorphic and Primes lens?
ohmss006 1 month ago
@ohmss006 Diopters should always be placed in front of the anamorphic in order to enhance sharpness and/or correct chromatic aberrations (achromatic diopters) due to the fixed distance between the concave and convex elements of the anamorphot. Placing a diopter before the anamorphic attachment will not have any effect on correcting such defects. In brief, it would be similar to using a macro lens behind the anamorphot. The resulting image would still be blurry.
Anamorphics 1 month ago
@ohmss006 The generic anamorphic adapter gives its best when used with wide angle taking lenses (for instance 24mm).
Still softens the picture, but it is less noticeable since almost everything is in focus.
Some quality +0.5 diopters or a +1 diopter in front of your generic anamorphic adapter will definitely make things a lot lot better for shooting with focal lengths longer than 50mm and at wide apertures. So don't think about it twice!
Anamorphics 1 month ago
Hi, thanks for getting back to me adn that was vewry informative as well.
However, I dont quite understand why it has to be infront of the anamorphic lens, because isnt that lens itself causing the bad image quality in the first place? and thus an achromat placed beforehand would correct any of that len's degradation???
ohmss006 1 month ago
@ohmss006
Putting the diopter before the anamorphic is wrong because:
1) you don't make your anamorphic focus closer (which is the purpose)
2) you don't correct possible chromatic aberrations of the anamorphic
3) Some anamorphics like the Iscorama need the taking lens to focus always to infinity (and focus only through the anamorphic focus ring). If you put a diopter in front of your taking lens this will never focus to infinity, so you will never get proper focus in your anamorphic system.
Anamorphics 1 month ago
I'm actually doing this on my Panasonic GH2 on my 14-45mm f3.5 and 20mm f1.7 and both looks quite bad if I want very good image quality.
Thanks again, that was really helpful and hope to hear back! :D
ohmss006 1 month ago