I have a MIR-20 2.5 that is in great/mint/new condition, wonderfully sharp, that I use with my Sigma SD14. My shortest M42 extension tubes which I think are...
(In reply) - Your essential problem is stemming from the use of a 20mm lens for macro - not ideal, since the lens cannot rack out the way that even a 50mm...
Richard, Ebay # 120324455911 is a set of tubes including a 7mm. Bart. ... From: Richard Lynch To: ClubM42@yahoogroups.com Sent: Saturday, November 01, 2008...
... Actually, sorry, was crossing my wires. It is an MIR-47M 20mm 2.5 ... It is manual focus already, so that isn't an issue. I'll check him out. I already...
(In reply) - Based on what the specs say, this will be an unusual choice for macro. The specs seem to indicate that the designer tried to overcome the "lack...
... I excel in unusual choices for macro. I've been using my Helios 40-2 for quite a while, and have tried the Jupiter-9 as well. These are some of the things...
(In reply/trimmed) - I have the P6 Zeiss Sonnar 180mm f/2.8 as well that was multicoated for me at Arax (they no longer have access to the machine), along with...
DOF is a function of magnification and relative aperture( f-stop). focal length is not a factor. Short macro lenses dont have more depth of field as longer...
(In reply) - To foreshorten a lengthly technical discussion, which then can be linked even to crop-factor issues with DSLR's and "relative" focal lengths ... ...
RE the aforementioned: In movies these kinds of perspective (and resulting DOF changes) can be used by the filmmaker - one extreme example is the "dolly zoom",...
... I am perhaps not understanding the reply...Though a short lens will have generally different DOF than a long lens as they do not achieve the same...
... BTW -- I did find what I believe is a very short tube based on this prompt -- either a different 7mm or even a 6mm, as the owner of those would only ship...
(In reply) - You are mixing different parameters, apparently. Lenses of the same focal length, on the same film format, will have the same hyperfocal scale....
http://www.nytimes.com/2008/11/13/technology/personaltech/13basics.htm l?_r=1&ref=personaltech&oref=slogin Since sensor sizes in compact cameras haven't gotten...
Hello list, Just letting you know in case anyone of you is interested. I am selling a nice 2.8/80 Biometar in our beloved M42 mount. You can take a look at it...
Pavels CZJ 80/2.8 sold for US$250 ! ... anyone been following the prices of these ? I haven't followed them in a while but was wondering whether they're...
(In reply) - Happy New Year. IMO we've seen the end of the bull market in M42 prime; in part because of the worldwide economy; and in part because of the...
hi ! Yes, I know cameraquest was preparing a Leica-M/micro 4/3 adapter... now I know Novoflex is preparing same. I will probably pick one of them up , along...
(In reply) - The key to what Novoflex is doing is adapters to multiple camera mounts (see original link at the bottom) - "Adapters for Leica R, Nikon,...
http://www.akihabaranews.com/en/news-17248- The+20+bestseller+DSLR+in+Japan+this+Year.html (IMO the inclusion of Lumix-G1 in a "DSLR" list indicates the...
The movie mode certainly is interesting... but have you tried manual focusing thru a 4/3 camera ? It's horrendously small. You are practically reliant on the...
... (Panasonic has adapted a 1.44 MP EVF from their pro video cameras, and the reviews have been excellent on its detail - plus it can boost the signal and...
... ========= The crop-factor issue will only be overcome with a 24x36 sensor; and then you're getting into pro-level heavy modern lenses for the image circle....
About 2 years ago I tried to get some information about the optical effects of introducing converters and adapters in the optical path of a lens. Like: "using...
About 2 years ago I tried to get some information about the optical effects of introducing converters and adapters in the optical path of a lens. Like: "using...
(In reply) - That's all you got from the entire discussion? A typo? You should be happy about having another potential "home" for M42 lenses. "The APS-C...
I know very little about these telextenders. Let me tell you why. When I started in Optics I was trained as a microbiology major graduate by the guys at Zeiss...
(In reply) - Then, there's the exposure loss ... When these first came out (dating myself, once again) I went to Spiratone and got the 1.4x. Degraded image...
The advice Joe Strain received as a student was sound and obviously well received. The geek version of the "there's no such thing as a free lunch" is known in...
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