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#21
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Extra lenses with enlarger - why?
In article ,
Bogdan Karasek wrote: Hi, I certainly would very much appreciate that kind of information as it would help me to optimize my lens selection for the size of the print, 8x10, 11x14, 16x20 and formats ranging from 35mm, 6x6, 6x9, 3x4in, 4x5 and 5x7. What's best for the desired result and do I have the lens for it? Cheers, Bogdan John wrote: On Sun, 19 Mar 2006 19:25:06 -0500, Bob Salomon wrote: To expand on this just a little, another rule (rule of pinky?) is that while you shouldn't use a lens with a shorter focal length than what is "normal" for the format Unless you are going to use a wide angle enlarging lens to allow you to make very high quality prints 30% larger then a normal focal length enlarging lens at the same negative to baseboard distance. Bob, Would you take the time to share with the group the optimizations for the different focal length lenses ? As I remember from our conversation a couple of years ago, most enlarging lenses are optimized for 6~10X. == John S. Douglas Photographer & Webmaster www.legacy-photo,com www.xs750.net See: http://www.linos.com/en/prod/obj_vergroesserung.html -- To reply no_ HPMarketing Corp. |
#22
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Extra lenses with enlarger - why?
The 35mm Leica Autofocus enlarger (V35) uses a 40mm.
-- darkroommike "Bogdan Karasek" wrote in message ... Hi all, The diagonal of a 35mm neg (24mmx36mm) gives you 43mm whereas the usual enlarging lens for 35mm negs is a 50mm. Is this significant in terms of results? I have a 25mm for half-frame but I seem to remember that someone, somewhere, made a 45mm enlarging lens for 35mm negs? (I'm not talking about the the wide-angle enlarger lenses). Maybe it's my imagination? Cheers, Bogdan Joe Makowiec wrote: On 19 Mar 2006 in rec.photo.darkroom, Gabriel wrote: ahhhh..... of course. Told you it was a dumb question. :-] Rule of thumb is that 'normal' enlarger lens for a given negative size is roughly the same as 'normal' taking lens, or roughly the diagonal of the negative. -- __________________________________________________ ________________ Bogdan Karasek Montral, Qubec e-mail: Canada "Wovon man nicht sprechen kann, darber muss man schweigen" "What we cannot speak about we must pass over in silence" Ludwig Wittgenstein __________________________________________________ ______________ |
#23
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Extra lenses with enlarger - why?
Got it just backwards.
-- darkroommike "Dennis" wrote in message ... This is my guess ... (correct me if I am wrong): The 75mm has the correct focal length to magnify the 35mm film size to a usable projector height and the coverage (field of view to cover the size of the negative). The 55mm lens has a wider coverage to take into account the larger size of the negative and also magnify the film to the similar projector heitht of the enlarger. Gabriel wrote: Okay - this might sound like a dumb question - the "new" enlarger I just picked up (1960s vintage Opemus III) has two lenses, with the numbers 4.5/55 and 4.5/75 on them. 4.5 is the maximum aperture, of course, and I presume the 55 and 75 refer to focal lengths. Why would I want this choice of lenses, and under what circumstances might I prefer one over the other? Thanks, Gabriel -- Living on Earth may be expensive, but it includes an annual free trip around the sun. www.oyamaphotography.com |
#24
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Extra lenses with enlarger - why?
On Mon, 20 Mar 2006 00:10:51 -0500, Bogdan Karasek
wrote: As a former teacher, I must object There are no "dumb" questions You've obviously never worked in tech support ;) Rule # 1 - Never overestimate the intelligence of the customer. == John S. Douglas Photographer & Webmaster www.legacy-photo,com www.xs750.net |
#25
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Extra lenses with enlarger - why?
On Sun, 19 Mar 2006 21:27:39 -0800, David Nebenzahl
wrote: Bogdan Karasek spake thus: As a former teacher, I must object There are no "dumb" questions, [...] I thought you were supposed to say "the only dumb questions are the ones you don't ask". Don't ever, I mean EVER (!) say this to a 2 year old ! == John S. Douglas Photographer & Webmaster Father of Sean (4) and Erin (2) |
#26
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Extra lenses with enlarger - why?
On Mon, 20 Mar 2006 00:33:09 -0500, Bogdan Karasek
wrote: Hi all, Is this a 5x7 Elwood? You need a 218mm lens, no? No. The thought grabbed me when I saw someone put a 100 enlarging lens onto a view camera for use as a macro lens. The angle of projection is only half the equation. The distance of the lens from the negative is the other part and since I'm only enlarging 2X 5X7 to 10X14, there's simply no need for me to use a long lens as far as I can tell. I have one and am putting an APO Nikkor 210/9.0. That should do it but 135??? Have to try it it with my 135 Componon-S I'd love to hear your comparison and opinions on that APO Nikkor. I hear they're really good lenses. == John S. Douglas Photographer & Webmaster www.legacy-photo,com www.xs750.net |
#27
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Extra lenses with enlarger - why?
On Mon, 20 Mar 2006 00:40:33 -0500, Bogdan Karasek
wrote: I certainly would very much appreciate that kind of information as it would help me to optimize my lens selection for the size of the print, 8x10, 11x14, 16x20 and formats ranging from 35mm, 6x6, 6x9, 3x4in, 4x5 and 5x7. What's best for the desired result and do I have the lens for it? Holy smokes ! I would suggest sticking to a few basics ! I have all of those formats but I print specific format prints from each. Generally : 35 mm - 6 X 9 6 X 7 - 10 X 12.5 4 X 5 - 10 X 12.5 5 X 7 - 10 X 14 Very rarely would I bother with anything larger. == John S. Douglas Photographer & Webmaster www.legacy-photo,com www.xs750.net |
#28
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Extra lenses with enlarger - why?
John spake thus:
On Sun, 19 Mar 2006 21:27:39 -0800, David Nebenzahl wrote: Bogdan Karasek spake thus: As a former teacher, I must object There are no "dumb" questions, [...] I thought you were supposed to say "the only dumb questions are the ones you don't ask". Don't ever, I mean EVER (!) say this to a 2 year old ! Why? -- Second, Scientologists are like computers trying to run an emulation of another computer. It can be done, but the performance is awful. Scientologists are trying to run a bad copy of LRH. - Keith Henson, from alt.religion.scientology |
#29
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Extra lenses with enlarger - why?
John spake thus:
On Mon, 20 Mar 2006 00:10:51 -0500, Bogdan Karasek wrote: As a former teacher, I must object There are no "dumb" questions You've obviously never worked in tech support ;) Rule # 1 - Never overestimate the intelligence of the customer. Can you help me with my computer's coffee cup holder? It broke again. -- Second, Scientologists are like computers trying to run an emulation of another computer. It can be done, but the performance is awful. Scientologists are trying to run a bad copy of LRH. - Keith Henson, from alt.religion.scientology |
#30
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Extra lenses with enlarger - why?
On Mon, 20 Mar 2006 21:22:41 -0800, David Nebenzahl
wrote: Rule # 1 - Never overestimate the intelligence of the customer. Can you help me with my computer's coffee cup holder? It broke again. I can't wait for the day they get rid ofa few things : #1) AOL #2) Idiots who don't know how to use a CDROM. #3) Managers who don't know anything about the products or services their company provides. #4) Stockholders == John S. Douglas Photographer & Webmaster www.legacy-photo,com www.xs750.net |
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