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blankmampf · 03-05-2022, 06:28 AM - **3 Likes**

Maybe not a beautiful image or lens, but certainly one for my fetish of fast lenses - today I received this glass gem in the mail, a Zeiss R-Biotar 50/0.77, I hope I'll be able to adapt it to my Fuji X-E2, flange distance is extremely short and only allows focus at ~20cm distance.
It's certainly giving me Canon 7/50mm 0.95 vibes

**pepperberry farm** · 03-05-2022, 06:40 AM

Originally posted by blankmampf

Maybe not a beautiful image or lens, but certainly one for my fetish of fast lenses - today I received this glass gem in the mail, a Zeiss R-Biotar 50/0.77, I hope I'll be able to adapt it to my Fuji X-E2, flange distance is extremely short and only allows focus at ~20cm distance.
It's certainly giving me Canon 7/50mm 0.95 vibes

nice - if you are able to mount it and take some shots, I'd be interested in seeing them.....

blankmampf · 03-05-2022, 10:02 AM

Originally posted by pepperberry farm

nice - if you are able to mount it and take some shots, I'd be interested in seeing them.....

I've done a few test shots by simply holding the lens in the one hand and the camera in the other. The images came out very soft, any highlights create strong glowy flaring, and as a result it takes the description of "dreamy" to a whole other level

Adding a long black cardboard lens hood didn't improve the image much, but I never expected this lens to have good optical performance.

Jonathan Mac · 03-07-2022, 07:59 AM - **1 Like**

Originally posted by blankmampf

Maybe not a beautiful image or lens, but certainly one for my fetish of fast lenses - today I received this glass gem in the mail, a Zeiss R-Biotar 50/0.77, I hope I'll be able to adapt it to my Fuji X-E2, flange distance is extremely short and only allows focus at ~20cm distance.
It's certainly giving me Canon 7/50mm 0.95 vibes

Wow. What would that lens originally have been used on?

**pepperberry farm** · 03-07-2022, 08:21 AM

Originally posted by Jonathan Mac

Wow. What would that lens originally have been used on?

the "R" stands for "Roentgen"; I believe it's for viewing x-rays....

(I did some googling)

**JensE** · 03-07-2022, 08:37 AM - **1 Like**

Originally posted by pepperberry farm

the "R" stands for "Roentgen"; I believe it's for viewing x-rays....

According to what I found, they have been used to take photographs of fluorescent X-Ray screens, used in Tubeculosis-diagnostics. Using full size film directly to capture the lung X-Ray would have been prohibitively expensive for the screening campaigns.

**pepperberry farm** · 03-08-2022, 05:06 AM - **1 Like**

**pepperberry farm** · 03-11-2022, 05:11 AM

leto · 03-19-2022, 12:02 AM - **1 Like**

I have just received this gem.

Jonathan Mac · 03-19-2022, 10:10 AM

Originally posted by leto

I have just received this gem.

Aren't gems supposed to be small?

leto · 03-19-2022, 12:34 PM - **1 Like**

it's quite unique for me, because it belonged to Eric Hosking, bird's photographer.

**pepperberry farm** · 03-19-2022, 01:46 PM

Originally posted by leto

it's quite unique for me, because it belonged to Eric Hosking, bird's photographer.

cool - so the lens has provenance..... which model is it?

leto · 03-19-2022, 02:20 PM - **1 Like**

I believe its exactly the one in the picture.
Kilfitt 600mm f5.6. The construction is very simple, just two elements.

**pepperberry farm** · 03-20-2022, 07:20 AM

**pepperberry farm** · 03-21-2022, 04:20 AM

03-19-2022, 12:02 AM - 1 Like	#714
leto New Member Join Date: Feb 2021 Posts: 23	I have just received this gem. Attached Images

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03-05-2022, 06:28 AM - 3 Likes	#706
blankmampf Senior Member Join Date: Feb 2021 Location: Lübeck Posts: 136	Maybe not a beautiful image or lens, but certainly one for my fetish of fast lenses - today I received this glass gem in the mail, a Zeiss R-Biotar 50/0.77, I hope I'll be able to adapt it to my Fuji X-E2, flange distance is extremely short and only allows focus at ~20cm distance. It's certainly giving me Canon 7/50mm 0.95 vibes

03-05-2022, 06:40 AM	#707
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,797	Originally posted by blankmampf Maybe not a beautiful image or lens, but certainly one for my fetish of fast lenses - today I received this glass gem in the mail, a Zeiss R-Biotar 50/0.77, I hope I'll be able to adapt it to my Fuji X-E2, flange distance is extremely short and only allows focus at ~20cm distance. It's certainly giving me Canon 7/50mm 0.95 vibes nice - if you are able to mount it and take some shots, I'd be interested in seeing them.....

03-05-2022, 10:02 AM	#708
blankmampf Senior Member Join Date: Feb 2021 Location: Lübeck Posts: 136	Originally posted by pepperberry farm nice - if you are able to mount it and take some shots, I'd be interested in seeing them..... I've done a few test shots by simply holding the lens in the one hand and the camera in the other. The images came out very soft, any highlights create strong glowy flaring, and as a result it takes the description of "dreamy" to a whole other level Adding a long black cardboard lens hood didn't improve the image much, but I never expected this lens to have good optical performance.

03-07-2022, 07:59 AM - 1 Like	#709
Jonathan Mac Pentaxian Join Date: Apr 2009 Location: Madrid, Spain Posts: 10,911	Originally posted by blankmampf Maybe not a beautiful image or lens, but certainly one for my fetish of fast lenses - today I received this glass gem in the mail, a Zeiss R-Biotar 50/0.77, I hope I'll be able to adapt it to my Fuji X-E2, flange distance is extremely short and only allows focus at ~20cm distance. It's certainly giving me Canon 7/50mm 0.95 vibes Wow. What would that lens originally have been used on?

03-07-2022, 08:21 AM	#710
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,797	Originally posted by Jonathan Mac Wow. What would that lens originally have been used on? the "R" stands for "Roentgen"; I believe it's for viewing x-rays.... (I did some googling)

03-07-2022, 08:37 AM - 1 Like	#711
JensE Site Supporter Join Date: Dec 2015 Location: Leipzig Photos: Gallery \| Albums Posts: 1,977	Originally posted by pepperberry farm the "R" stands for "Roentgen"; I believe it's for viewing x-rays.... According to what I found, they have been used to take photographs of fluorescent X-Ray screens, used in Tubeculosis-diagnostics. Using full size film directly to capture the lung X-Ray would have been prohibitively expensive for the screening campaigns.

03-08-2022, 05:06 AM - 1 Like	#712
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,797

03-11-2022, 05:11 AM	#713
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,797

03-19-2022, 10:10 AM	#715
Jonathan Mac Pentaxian Join Date: Apr 2009 Location: Madrid, Spain Posts: 10,911	Originally posted by leto I have just received this gem. Aren't gems supposed to be small?

03-19-2022, 12:34 PM - 1 Like	#716
leto New Member Join Date: Feb 2021 Posts: 23	it's quite unique for me, because it belonged to Eric Hosking, bird's photographer.

03-19-2022, 01:46 PM	#717
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,797	Originally posted by leto it's quite unique for me, because it belonged to Eric Hosking, bird's photographer. cool - so the lens has provenance..... which model is it?

03-19-2022, 02:20 PM - 1 Like	#718
leto New Member Join Date: Feb 2021 Posts: 23	I believe its exactly the one in the picture. Kilfitt 600mm f5.6. The construction is very simple, just two elements.

03-20-2022, 07:20 AM	#719
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,797

03-21-2022, 04:20 AM	#720
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,797

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