Hacker
黑客
Resistance is futile. What is the thread size for the filter?
Other/Uncategorized Lovely Pentax 43/1.9 Special in LTM mount
- Thread starter Abbazz
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Other Screw mount bodies/lenses
49mm, a common and traditional Pentax size. You're going to love it... 🙂Hacker said:
Edit: 49mm for the SLR version, 40.5mm for the LTM version.
Last edited:
Back to Chris's comment... It's been my observation that good SLR lenses tend to have fewer diaphragm blades than good RF lenses. And I believe this due to weight/inertia reasons. The SLR blades are spring-loaded to snap back when released, as of course they close down and reopen each exposure. Total weight of the blades would slow response and more blades also add friction. This of course is not an issue for RF lenses.ChrisN said:
furcafe
Veteran
Don't know about the SLR version, but the LTM has a 40.5mm filter thread.
Hacker said:
Hacker
黑客
I'm confused: 40.5mm or 49mm for the filter diameter for LTM?
Sorry, misread your question! Threaded for 40.5mm filters for the Leica-mount L Special, and 49mm for the FA mount Limited.Hacker said:
Hacker
黑客
Doug said:
Got it, thanks!
Captain
Well-known
It looks a big lens.
sepiareverb
genius and moron
40.5 is correct I believe. It is not 49mm. I had this lens for a while, and interestingly the Rollei 80/2.8 Hacker, they are both wonderful.
raid
Dad Photographer
Bob allowed me to try out his Pentax 43mm lens. I took two rolls of film with it, and I took another roll with the Summicron-c 40mm/2 for comparison purposes. Both lenses did extremely well. There was no clear superiority of the Pentax lens over the less expensive Summicron-C. Bob may have commented once about it.
raid
Dad Photographer
Hacker
黑客
raid said:
Raid, what about flare? Isn't the Cron 40mm uncoated?
sepiareverb
genius and moron
My 40/2.0 was coated if I'm remembering correctly. We're talking 70's, so some coating must have been on there by then.
I didn't see surprising flare with either the 43 or the 40, and I shot the Pentax a lot in late day light.
I didn't see surprising flare with either the 43 or the 40, and I shot the Pentax a lot in late day light.
raid
Dad Photographer
The Summicron is coated, so there were no problems with flare.
xayraa33
rangefinder user and fancier
most lenses made after WW 2 were coated.
Hacker
黑客
Sorry to ask another stupid question. Is the 40 Cron single coated then vs the Pentax multicoating?
Sonnar2
Well-known
Someone dig out a lens diagram of the Pentax 43/1.9?
7/6 reads like a Gaussian type, but could be a retrofocus too because of its length!
have fun, Frank
7/6 reads like a Gaussian type, but could be a retrofocus too because of its length!
have fun, Frank
furcafe
Veteran
According to Mr. Gandy, "[c]ontrary to some claims, best evidence indicates [the 40/2 Summicron] was not a multicoated lens, unlike the later 40/2 Rokkor for the CLE."
http://www.cameraquest.com/mlenses.htm
http://www.cameraquest.com/mlenses.htm
Hacker said:
sepiareverb
genius and moron
Sonnar2 said:
We'd need someone from Japan, Pentax USA had zero idea what I was talking about when I tried to get anything about this lens. I was told that Pentax had never made such a lens.:bang:
