Re: Process Lens & Close Work
Quote:
Originally Posted by
neil poulsen
That's a good point. :o
While I would consider something else, I was thinking of a 210mm G-Claron as a process lens, and definitely a Plasmat (the only other lenses that I have) in the same focal length as a "standard" lens.
I have it in mind to photograph a violin in vertical, frontal position, straight on and across using a 5x7 camera with no movements. I would enlarge either to 11x14 or 16x20. I would like to see every tiny spec of detail on the front of the violin.
If that is your goal then it won't matter when using f22-f22 1/2. But going closer to 1:1 it will make the G-Claron shine, while if you try to shoot wide open the plasmat will shine - my Apo-symmar 210mm was so sharp in center it did match my 35mm lenses, while my process lenses do not show super sharpness before f11-f16.
https://www.flickr.com/photos/470525...57634939838558 at the bottom has 1:1 pictures comparing 210mm of single-coated Fujinon-W, Nikkor-W, Apo-Gerogon f9 and a Macro-Sironar-N 210mm macro-on-mirrorless shots, done just to educate myself.
Sent fra min SM-G975F via Tapatalk
Re: Process Lens & Close Work
Quote:
Originally Posted by
neil poulsen
I have it in mind to photograph a violin in vertical, frontal position, straight on and across using a 5x7 camera with no movements. I would enlarge either to 11x14 or 16x20. I would like to see every tiny spec of detail on the front of the violin.
A full size adult violin is about 23" long. With a 5x7 sheet of film, and without taking into account the background, you're at a magnification of 4.6:1 (landscape orientation) or 3.3:1 (portrait orientation) just for the violin. You're more or less at the magnification ratio of portraits of people. A standard lens should work fine.
Re: Process Lens & Close Work
In fact, I'd be using a 180mm Apo Symmar, which has plenty of image circle for 5x7.
This has turned into quite a helpful thread. I appreciate the responses that have been offered.
Quote:
Originally Posted by
Oslolens
If that is your goal then it won't matter when using f22-f22 1/2. But going closer to 1:1 it will make the G-Claron shine, while if you try to shoot wide open the plasmat will shine - my Apo-symmar 210mm was so sharp in center it did match my 35mm lenses, while my process lenses do not show super sharpness before f11-f16.
https://www.flickr.com/photos/470525...57634939838558 at the bottom has 1:1 pictures comparing 210mm of single-coated Fujinon-W, Nikkor-W, Apo-Gerogon f9 and a Macro-Sironar-N 210mm macro-on-mirrorless shots, done just to educate myself.
Sent fra min SM-G975F via Tapatalk
Re: Process Lens & Close Work
Please define 'close work' exactly
When does normal become Macro andor close work
Ken Lee is a master of typewriter keys, what is that called
Is there a rule?
Quote:
Originally Posted by
r.e.
A full size adult violin is about 23" long. With a 5x7 sheet of film, and without taking into account the background, you're at a magnification of 4.6:1 (landscape orientation) or 3.3:1 (portrait orientation) just for the violin. You're more or less at the magnification ratio of portraits of people. A standard lens should work fine.
Re: Process Lens & Close Work
Quote:
Originally Posted by
Tin Can
Please define 'close work' exactly
When does normal become Macro andor close work
Ken Lee is a master of typewriter keys, what is that called
Is there a rule?
I didn't even use the term "close work", and I addressed your questions in post #3. I would have thought that what I said in the post to which you're responding (#12) is self-explanatory.
Re: Process Lens & Close Work
Thank you
I will be using for the first time a Nikkor 210mm AM ED Macro
I have used Plasmasts at +3 on 11X14 some years ago and was blasted universally by Forum experts
Quote:
Originally Posted by
r.e.
I didn't even use the term "close work", and I addressed your questions in post #3. I would have thought that what I said in the post to which you're responding (#12) is self-explanatory.
Re: Process Lens & Close Work
G-Claron plasmats, generally in no. 1 shutter, were deliberately marketed for closeup tabletop photography, and are excellent for general shooting also, clear out to infinity. Not fully equal to Apo Nikkor process lenses in my own tests, but plenty good enough for most closeup purposes, and more convenient. And a 210 GC easily covers 5X7 stopped down, even at infinity. If one is commercially specializing in big enlargements of diamond rings or insect portraits, then a specialty lens like the 210 Nikkor AM ED might be a worthwhile investment. Otherwise, the specially close-range corrected (but also highly versatile) plasmats like GC and Fuji A series will do a decent job if you want something already in shutter. I've done high resolution 1:1 work with the 360 Fuji A on my 8x10, as well as with the 180 A on 4x5 format.
Re: Process Lens & Close Work
Re: Process Lens & Close Work
APO artar, APO ronar and similar has been the table top and "close up" image lens of choice for decades. They do excellent from infinity focus to life size 1:1.
The more pressing need for close up images, lighting, camera support/set up stability. Lighting is always an issue for these images as is camera stability/set up. Weaknesses in camera support and set up negates any advantage the the lens might have if stuff does not stay put.
Other pressing question becomes DOF/F, unless stacking of properly focused images is used, DOF/F can be a real issue. Stopping the lens down to f90 or more is not always the cure for this way of nature.
Bernice
Re: Process Lens & Close Work
My practice-based opinion is here: https://www.largeformatphotography.i...=1#post1394698
But that's all about the purely technical stuff such as sharpness and contrast. And as I said more than once, for 3-D subjects, the out of focus rendition is far more important for me. So for anything 3-D I just use Dagors.