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PostPosted: Thu Jun 23, 2016 2:26 pm    Post subject: Reply with quote
No, that was reproduction of images on large canvas, not photolithography


PostPosted: Thu Jun 23, 2016 4:28 pm    Post subject: Reply with quote
kds315* wrote:
No, that was reproduction of images on large canvas, not photolithography


Oh, of course! I am forgetful, since that is a process I've never had to endure. So focal length is related to the size of the print?


PostPosted: Fri Jun 24, 2016 11:15 am    Post subject: Reply with quote
Teemō wrote:
kievuser wrote:
I borrowed a few images FYI. The Fuzhou 900mm F11 APO is an uncommon 4g-6e design. It is the first time I saw this lens. It was made in 1983.


Thanks. Do you mean photolithography by 'printing lens'? If so, I guess the long focal length is just to reach a high magnfication for small circuitry patterns?


I was not sure of their English names for this type of lenses. In Chinese, these are called ZHIBAN (制版）lens. Perhaps process lens, or reproduction lens is a correct name? I posted a few Chinese lithographic lenses in this thread. They are very different in shapes.


PostPosted: Fri Jun 24, 2016 11:23 am    Post subject: Reply with quote
A lens hood for those Chinese TLRs, but it can be used for Russian I-50,I-22, and many Chinese enlarging lenses. It makes the rigid I-50 a lot nicer to look at. Wink





PostPosted: Fri Jun 24, 2016 12:04 pm    Post subject: Reply with quote
kievuser wrote:
Teemō wrote:
kievuser wrote:
I borrowed a few images FYI. The Fuzhou 900mm F11 APO is an uncommon 4g-6e design. It is the first time I saw this lens. It was made in 1983.


Thanks. Do you mean photolithography by 'printing lens'? If so, I guess the long focal length is just to reach a high magnfication for small circuitry patterns?


I was not sure of their English names for this type of lenses. In Chinese, these are called ZHIBAN (制版）lens. Perhaps process lens, or reproduction lens is a correct name? I posted a few Chinese lithographic lenses in this thread. They are very different in shapes.


Someone correct me if I'm wrong, but I think lenses for photographic prints are called 'enlargement lenses'? Are the two types different?


PostPosted: Fri Jun 24, 2016 12:13 pm    Post subject: Reply with quote
Teemō wrote:
Someone correct me if I'm wrong, but I think lenses for photographic prints are called 'enlargement lenses'? Are the two types different?


In the age of film, the most commonly used name was "enlarger lens".


PostPosted: Fri Jun 24, 2016 1:32 pm    Post subject: Reply with quote
Gerald wrote:
Teemō wrote:
Someone correct me if I'm wrong, but I think lenses for photographic prints are called 'enlargement lenses'? Are the two types different?


In the age of film, the most commonly used name was "enlarger lens".


Right, thank you.


PostPosted: Fri Jul 01, 2016 9:36 pm    Post subject: Reply with quote
The vintage Chinese enlarger lenses is a new area for me to explore, so I bought quite a few of them. Here is a group shot of a few earlier 90mm F4.5 ones, and the earliest was made in 1961. (The big black one on the right).



PostPosted: Fri Jul 01, 2016 9:59 pm    Post subject: Reply with quote
The most common focul length enlarger lenses are those 75mm ones. A better quality one like Shanghai made FD-II 75/F3.5 enlarger lens cost RMB 142.80 yuan, while a Shanghai Seagull 4B TLR only cost 120 yuan RMB. These higher quality ones often have more aperture blades, while lower priced ones were often made from photographic lenses with only 6 blades.
The 80mm F4 and 80mm F5.6 4g/5e enlarger lenses are a surprise find to me. Before I know it, I already accumulated a large amount of these, but the hunt continues.....Those 80mm-105mm lenses were designed for 6x7,6x9 negatives so that they will be good for taking pictures for those digital medium format cameras.Wink





PostPosted: Tue Jul 19, 2016 4:29 am    Post subject: Reply with quote
Some Chinese 35mm cine projection lenses. You don't see them offered for sale at ebay very often, but they are easy to find in China. Some people modefied them to take pictures with decent results.



PostPosted: Tue Jul 19, 2016 4:41 am    Post subject: Reply with quote
I have a soft spot for vintage all metal 'silver' lenses. These remind me of the good, old days. Like common leica cameras, condition decides their collectable value as they are not difficult to find. But unlike Leica film rangefinder cameras, they can always be used today in this digital age. Today very few people still carry a film camera for taking pictures.



Laugh 1


PostPosted: Tue Jul 19, 2016 4:58 am    Post subject: Reply with quote
What makes the small Tevidon 10mm F2 so heavy? The bigger one is a CJZ Biometar 2.8/80 with a P6-M42 adaptor and some brass parts, but still no match. Laugh 1 Thank You Dog



PostPosted: Tue Jul 19, 2016 10:14 am    Post subject: Reply with quote
kds315* wrote:
Opticus wrote:
Perkin Elmer 114mm f/0.95 - SN 0071



Xray lens??


No, aerial lens. 11mm backfocus, covers 60mm image circle


PostPosted: Tue Jul 19, 2016 4:55 pm    Post subject: Reply with quote
OK thanks! Happy to learn... Wink


PostPosted: Tue Jul 19, 2016 4:56 pm    Post subject: Reply with quote
kds315* wrote:
OK thanks! Happy to learn... Wink

I am sure you will be happy to own it too. Wink


PostPosted: Tue Jul 19, 2016 5:14 pm    Post subject: Reply with quote
calvin83 wrote:
kds315* wrote:
OK thanks! Happy to learn... Wink

I am sure you will be happy to own it too. Wink


I have enough doorstops already! Wink


PostPosted: Tue Jul 19, 2016 5:28 pm    Post subject: Reply with quote
kds315* wrote:
calvin83 wrote:
kds315* wrote:
OK thanks! Happy to learn... Wink

I am sure you will be happy to own it too. Wink


I have enough doorstops already! Wink


One can never have enough door stops Laugh 1


PostPosted: Thu Jul 21, 2016 3:18 am    Post subject: Reply with quote
A Komura 135mm F2,5 in Nikon mount. Rare or not? I forgot which way to ture the ring to release the interchangeable mount.
Another one is also a Komura brand lens.A zoom lensin M42 mount. Both are used as a paper weight, not a door-stop. Laugh 1



PostPosted: Thu Jul 21, 2016 3:26 am    Post subject: Reply with quote
A Helios-40 85/1.5 with a very early s/n. I bought it in Moscow many years ago for USD 30 IIRC.


PostPosted: Thu Jul 21, 2016 3:49 am    Post subject: Reply with quote
A very rare Chinese cine prime, a 50mm F1.3(T1.4) lens. It is rare even among the already quite hard to find Chinese 35mm movie lenses. I never saw another one over the years. It is a 6g/7e design lens. Some adaptors are made for these Arriflex standard mount lenses.
The 20mm F2 is a lens with a very high optical quality made in late 1970's. It is a 7g/7e lens with a minimum focual distance of 0.3m only. It is also very compact and light.

Like 1




PostPosted: Thu Jul 21, 2016 4:00 am    Post subject: Reply with quote
I quite like the Komura 925 zoom. I still have one and do well with it. Its very common though.
The Komura 135 is quite uncommon in this later version, I dont know much about it. The earlier Komura preset 135's are very good and have a unique golden color. I like them a lot.


PostPosted: Thu Jul 21, 2016 4:08 am    Post subject: Reply with quote
kds315* wrote:
calvin83 wrote:
kds315* wrote:
OK thanks! Happy to learn... Wink

I am sure you will be happy to own it too. Wink


I have enough doorstops already! Wink


I actually used one of a Chinese GFL copy microscope as a doorstop. China made Zeiss GFL microscope copies since late 1950's. It is no harm for them, but you can never force a fat evil banker to do hard labour although I think they should be. Wink



PostPosted: Thu Jul 21, 2016 4:12 am    Post subject: Reply with quote
luisalegria wrote:
I quite like the Komura 925 zoom. I still have one and do well with it. Its very common though.
The Komura 135 is quite uncommon in this later version, I dont know much about it. The earlier Komura preset 135's are very good and have a unique golden color. I like them a lot.


Many thanks for the input. Yes these lens has a kind of special image quality. Thank you!


PostPosted: Thu Jul 21, 2016 4:29 am    Post subject: Reply with quote
For what its worth, around here the evil bankers, though they are quite evil, are quite thin because they spend a lot of time exercising at the health club.


PostPosted: Thu Jul 21, 2016 4:07 pm    Post subject: Reply with quote
luisalegria wrote:
For what its worth, around here the evil bankers, though they are quite evil, are quite thin because they spend a lot of time exercising at the health club.


If a guy who can make money out of thin air, then he can buy anything he wants. The only thing he can't buy is his health and people's love and respect. I expressed my disgust to those newly rich elite capitalists at the beginning of this thread. I am sorry to bring this up again. Now,let's go back to lenses.
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