 |
 | Search this Thread |
| 09-12-2017, 07:43 AM | #1 |
| Just Noticed that the Zenitar-K2 might be an Apochromat
The IR index seems to be right on the visible light index, my guess is that it is CA corrected for not only both visible light but also near IR. Any ideas?  通过我的 Nexus 6P 上的 Tapatalk发言 | |
| 09-12-2017, 08:42 AM | #2 |
|
Isn't part of being an apochromatic lens that it corrects spherical distortion?  (Taken with a Zenitar K2) | |
| 09-12-2017, 08:44 AM | #3 |
|
Ummmm...I believe the "R" is in place of the "4". The Helios 44M-6 has a similar marking...  Steve | |
| 09-12-2017, 08:50 AM | #4 |
 Originally posted by stevebrot  Ummmm...I believe the "R" is in place of the "4". The Helios 44M-6 has a similar marking... Steve my Helios 44K-4 has the same markings... | |
|
« Colors and contrast with four older M42 lenses (Zeiss, Asahi, Yashica, Helios)
|
Best way/place to sell lenses »
| Bookmarks |
| Tags - Make this thread easier to find by adding keywords to it! |
| index, ir, k-mount, light, pentax lens, slr lens |
| Thread Tools | Search this Thread |
| |
Similar Threads | ||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| For Sale - Sold: Film cameras for sale : Pentax K2 , K2 DMD, MZ-S, Contax 137 MA, Bessa R2 | GPZ | Sold Items | 18 | 10-04-2017 07:36 PM |
| Just noticed this on my K1 | CDW | Pentax K-1 | 4 | 07-21-2016 08:30 PM |
| Have I just noticed something, or is it just me.... | CaymanImaging | Pentax News and Rumors | 7 | 10-12-2009 12:49 PM |
| I might not be as lucky as frank ( just snatched a Pentax K2 ) | fearview | Pentax Film SLR Discussion | 9 | 10-05-2009 08:20 AM |
