I'm wondering...what is the magnification of 1:1 on APS-C. Since the image area is smaller, the magnification is greater. Is it around 1.25:1?
On Thu, Feb 28, 2013 at 7:20 AM, Paul Stenquist <[email protected]> wrote: > Congratulations. I've been using the original Vivitar Series 1 version for 15 > yard or so. Have never felt the need for another macro, and the longer reach > that APS-C gives it makes it all the better. > On Feb 27, 2013, at 8:50 PM, Darren Addy <[email protected]> wrote: > >> I guess this qualifies as a "gloat" although I gave a fair amount for >> this lens. >> >> A couple of weeks ago a manual focus Tokina AT-X 90mm f2.5 Macro with >> 1:1 Extender and original case showed up on an auction site. The >> problem was, the silly seller did not specify what mount the lens was. >> Now I'm not terribly familiar with the Tokina AT-X line, but this lens >> appeared (even from the inadequate photos) to be in superb condition. >> And I could make out a Green "A" at the end of the aperture ring. I >> surmised correctly, as it turns out, that this was the rare Bokina II >> in a PK/A mount. >> >> Having previously owned the Bokina I (the Tokina made Vivitar Series 1 >> 90mm f2.5 with 1:1 extender in KM mount), which I sold solely to >> partly finance my K-5, I was very interested to have the "improved" >> official Tokina AT-X version. I was even determined to sell my >> Pentax-F 100mm f2.8 Macro to pay for it. I took a chance and was the >> high bidder, getting it for $370, shipped. Since I had sold the >> original Bokina for over $500 and now had a PK/A in exchange, I felt >> pretty good about that. Fortunately, I sold other items to pay for it >> and did not have to part with my Pentax-F 100mm Macro. However, it >> remained to be seen if the AT-X was indeed a PK/A and if it had any >> problems. I'm happy to say that it arrived today and it is in >> absolutely pristine condition. >> >> I will now be in a position to do a head-to-head comparison between >> the two macro lenses and see if the AF of the Pentax is important to >> me, and if the Bokina II lives up to it's optical reputation (which is >> one of the nearest to Voigtlander Lanthar 125mm Macros that I have >> seen, in online comparisons). The Pentax also has the advantage of >> going to 1:1 without an extender. >> >> For starters, I am surprised at how light the Bokina II is, when >> compared to the tank-like original Bokina. For those interested, the >> definitive page on the Bokina II is here: >> http://makingnottaking.blogspot.com/2010/05/tokina-90mm-f25-at-x-macro-bokina.html >> >> I'm now *especially* looking forward to Spring! >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
