The A 400/5.6 is a much better lens than the screwmount, the SMC or
the M versions of the 400, in that it will focus close enough to get a
bird full frame, and it gives you all metering options on a Pentax
digital DSLR. I've seen them for less than $400. I think that's about
what I paid for mine four or five years ago. A decent lens. It also
works well with the Pentax AX-S 2 and 1.4 converters. It doesn't
accept the L converters. Some CA on digital cameras when shooting
branches against the sky, but that's fixable. I would guess the SMC
500/4.5 or 300/4 are even worse in that regard.
Paul
On May 27, 2009, at 8:28 PM, Tim Bray wrote:
On Wed, May 27, 2009 at 5:25 PM, Bob Sullivan
<[email protected]> wrote:
Tim,
A screwmount SMC Pentax 300mm f4 or 400mm f5.6 would be great.
Most everyone else passes on these as too old, their problem!
Those 300 screwmounts (under the Takumar name, right?) are all over
the place in the non-SMC version, harder to find with the SMC. How
big a deal is the coating? -Tim
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