View Full Version : ROSS Symmetrical F16 ANGLE?
seanwang
27-Nov-2017, 09:29
Does anyone know ROSS Symmetrical(protable) f16 angle? 75? 90? or 100?
Thanks.
Steven Tribe
27-Nov-2017, 09:35
There two F16's from Ross ( apart from the licensed Zeiss and Goertz lenses).
The "portable" is a a standard RR - scaled down in size to be ....... portable!
The other is a wide RR - but not that wide, I think.
Deciding which is which is a real problem as the size numbers and the focal lengths are very similar, if not identical!
Hi Sean,
Below is a catalog page of Ross portable symmetrical lens. It is a pretty old one because it only existed in Ross catalog till 189x.
The 8" focus length one can cover 8x10 so it should be a 80-degree lens.
seanwang
28-Nov-2017, 07:35
There two F16's from Ross ( apart from the licensed Zeiss and Goertz lenses).
The "portable" is a a standard RR - scaled down in size to be ....... portable!
The other is a wide RR - but not that wide, I think.
Deciding which is which is a real problem as the size numbers and the focal lengths are very similar, if not identical!
Thank you , the portable is portable, hahaha:cool:
seanwang
28-Nov-2017, 07:39
Hi Sean,
Below is a catalog page of Ross portable symmetrical lens. It is a pretty old one because it only existed in Ross catalog till 189x.
The 8" focus length one can cover 8x10 so it should be a 80-degree lens.
lucaas, thank you, this catalog is very useful.
I have no.3 and no.7, as my imprecise measurement, the "light circle" is about 95-100 degree, so in actual use might 80-90 degree.
Powered by vBulletin® Version 4.2.5 Copyright © 2024 vBulletin Solutions Inc. All rights reserved.