The quality and technical differences in Process lenses at 600mm and longer?

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Originally Posted by Asher Kelman

relatively low cost.

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I got my mint LOMO O-2 600mm (4/4 Dialyte) for some $30, now they are more expensive, perhaps $150 can be offered.

Lens lp/mm ratings in russian catalogs were very low, but I guess that testing conditions were quite different (%MTF) in the soviet times. I was not expecting much, but I've been inspecting several 8x10 shots and the lens it's very sharp, I'm curious about performance, and I plan to check it well. If no enlargement it's planned for sure it has way more IQ than required for total graphic quality.

it has a primitive coating, but's coated.


https://www.arnecroell.com/eastern-block-new.pdf

Farid, you're trying to be another Richard Learoyd. Google him. You might even try to find him. I don't do anything remotely like what he does so am not a very good person to ask about what he does, how he does it, and how he solved problems.

Learoyd uses, according to my friend Eric Beltrando, a 760 mm Apo-Ronar. He started with a 1200 Apo-Saphir, found it too long.

You should learn close-up photography arithmetic before you spend a penny on anything but that and before you dream more. You're a new arrival here, may not be aware of all of this site's resources. Look in the FAQs for information about lenses and about close-up work. There's another resource, a list of links to lens catalogs and so on, that you should also consult. A link to it is in the first post of this https://www.largeformatphotography.i...mainly)-lenses discussion. In particular, see its discussion of books on closeup photography. If I were you I'd buy a copy of Lefkowitz and study it.

I've never understood how people who use tent cameras maintain lens-film plane alignment. To me that problem seems quite difficult.

You're new here, we know very little about you and your experience/skills. Please tell us more, it will make communicating with you easier.

Good luck, have fun,

Dan

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Originally Posted by Pere Casals

I got my mint LOMO O-2 600mm (4/4 Dialyte) for some $30, now they are more expensive, perhaps $150 can be offered.

Lens lp/mm ratings in russian catalogs were very low, but I guess that testing conditions were quite different (%MTF) in the soviet times. I was not expecting much, but I've been inspecting several 8x10 shots and the lens it's very sharp, I'm curious about performance, and I plan to check it well. If no enlargement it's planned for sure it has way more IQ than required for total graphic quality.

it has a primitive coating, but's coated.


https://www.arnecroell.com/eastern-block-new.pdf

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Papi, in the USSR resolution was usually measured at full aperture.

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Originally Posted by Dan Fromm

Papi, in the USSR resolution was usually measured at full aperture.

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Thanks Dan, it's always a pleasure to learn something from you.

The LOMO 600 (@ f/22) shaped very well a cigarette butt from 170m far, so I guess that at least 40Lp/mm had to be there. I'll check it.

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Originally Posted by Dan Fromm

I've never understood how people who use tent cameras maintain lens-film plane alignment. To me that problem seems quite difficult.

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i would maybe do it with a laser measuring device... or similar but i know what you mean...



Hi Dan,

thanks for your response.

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Originally Posted by Dan Fromm

You're new here, we know very little about you and your experience/skills. Please tell us more, it will make communicating with you easier.

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this is stuff i do most of them taken with the D3s Nikon and Leica M9


www.faridlaid.com


but i also have the PB-6 Bellow mount from nikon...usually combines with the macro 105 f 2.8 nikkorr lens ... but i also used the 20mm retro mouned .. not much into macro though at the moment.

I own 3x 1200 Profoto generators and 3 1200W Lights ... so enough light to get something out of it i hope :)


I just have no clue about the ratios soon as i take a lens at a sertain distance from the body

smiles
farid

farid, Impressive images on you web site!

thanks a lot Jon, glad you like it :)

best regards
farid

I think what might be interesting for you is work of Brendan Barry https://brendanbarry.co.uk/category/work/