One is a 10x PKC and the other a 10x PK, both with a logo comprised of an inverted triangle with "CBS" in it. You can see the same logo on this ebay auction . Does anyone know what company this is? Hello, CBS stands for "Christoph Beck & Söhne", also known as "Beck, Kassel", a German optical firm m...

I hereby stand corrected... :oops: Thanks a lot for the clarification, my information on the Pentax bellows was clearly incomplete, hence my honest but blatant mistake ! Considering the dates you mention, it is also quite possible that Soligor did not create but simply copied the Pentax design, maki...

Murray, thanks for this comprehensive work and for making it freely available. I have a pair of Auto Bellows in M42 mount and love them I can only second that. I am myself an avid bellows user and think that this kind of initiative can only benefit the photomacrographic community by allowing more p...

Thanks Chris.
Do I need to say that I was myself quite thrilled with the find , and celebrated it accordingly ?

Hi all, Julodis onopordi sommeri is probably the rarest Buprestidae and one of the rarest beetles of the French fauna, being historically known from 4 very small localities. The last known finding occured un 2008, a single specimen from one of said localities. I was lucky enough to find a knew local...

Hi all, Some may remember the pics I posted here : http://www.photomacrography.net/forum/viewtopic.php?t=24543 , taken with a roughly 100 years old Reichert Polar 50mm f:4. Well, I got lucky and found its 75mm brother, older but as pristine as the 50mm was and much easier to use thanks to the longer...

No, I'm not 100 years old [49% : loading...] :lol: . On the other hand, the lens used to take these pics is about that old : a Reichert Polar 4/50mm , made somewhere between 1908 and 1914 . This little gem of a lens comes in a ridiculously small brass barrel with a 10 blades iris and has an RMS scre...

All the talk about the 70mm Sigma is making me want to buy one to try. But none of the ones I'm looking at seem to be claiming APO. Is this the right lens: http://www.adorama.com/SG7028EOS.html No, mine is for Sony DSLRs ! :smt040 Yes, it's the right lens. Apparently no longer listed as APO as was ...

Which is why I wrote "is marketed as APO" :lol: I've had several APO Sigmas in the past and still have 3 (3.5/180, 2.8/70, 4.5/500) and none is a truly perfect Apochromatic. On the other hand, all 3 exhibit extremely low CA, so I think we could say that the Sigma marketing team is less honest than a...

kds315* wrote:That's not apochromatic from what I know, so CA will get visible ...

The lens is marketed as APO and uses LD glass. As mentionned by Blame there's a bit of residual longitudinal CA but it actually is invisible on prints smaller than A2. And it is extremely sharp indeed !

Just got hold of my long time dream lens 8) , a 4/100 S-Planar lens head for bellows, complete with Contax tilt/shift bellows and a set of Contax extension rings, all of them almost as new... I just couldn't wait to test it on my Sony A850 DSLR, so I put my home made adapter behind the bellows and d...

Actually, Tiger (Mosquito) wanabee... :wink: Ocherotatus geniculatus (formerly Aedes geniculatus ), a close relative of the real Tiger Mosquito, Aedes albopictus . Both pics are handheld single shots from my Sony A850 with Minolta Autobellows III (tilt/shift version) with 5° tilt and Dine Corp macro...

The heart of a yellow primrose, taken with Zeiss S-Planar 2.8/60 on Sony A850. I love that lens !

...Or at least this lichen seems to think so...

Sony A850, Zeiss S-Planar 2.8/60, handheld, manual flash, f11, 1:1.

Same subject, playing with an old Convertible Symmar 5.6/150-12/265 barrel-mounted in front of a bellows. #1, single shot handheld, built-in flash http://www.photomacrography.net/forum/userpix/2307__DSC1837S1411024_1.jpg #2, stack of 3, handheld, built-in flash http://www.photomacrography.net/forum/...