You're confusing magnification with angle of view.
On 2/28/2013 8:02 AM, Zos Xavius wrote:
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!
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