Jan van Wijk wrote:
> Another question for the Brotherhood :-)
> I more or less came to the conclusion that a 67 (or 67II) with
> a 45 and 90 (or 105) would be a very good kit for landscapes,
> and with a longer lens added also usable for other nature subjects.
Yes - that is a valid conclusion
> These make me a bit unsure, it seems the 67 and 67II would have
> serious problems with mirror and shutter vibrations, making sharp
> handheld shots nearly impossible!
Not true - as always, it depends on the shutter speed. I find
that the mass of the 6x7 adds to stability in handheld work.
With 100asa, that works out to 1/250th @ f8 for "guaranteed"
hand work w/ my 105mm & 150mm. 1/125th @f11 is doable and
1/500th @ f5.6 is almost a no-brainer.
> Question: Is it really true that the 67 with standard lens (say
> 2.4 105mm) must be used on a tripod always to get sharp images ?
No - unless you are getting down into slow shutter speeds,
in which case any format would require support. I keep a
cushion cover w/ a 10lb bag of rice inside at hand for
"quick & effective" camera support when dragging out the
tripod would be a nuisance - it is equally effective, perhaps
even more so.
> About image quality, I feel the step from 35mm to 645 is much
> larger (3x in image area) than 645 to 67 (1.6x in image area).
Area is the wrong way to approach this. Use the short side
of the image instead. 35mm = 24mm/1inch, so 4x enlargment
gives a 4x6 print. 645 is ~45mmx56mm (a bit under 1 3/4inches)
and 6x7 is ~56mmx69mm (2.25x2.75inches). So 6x7 has a short
side as big as 645's long side! Image proportion also comes
into play when fitting images to "standard sizes" 645 is a
3:4 proportion, 35mm is a 2:3 and 6x7 is a 4x5 (ideal for
minimal loss at standard 8x10, 11x14, 16x20, 20x24 etc.
Bill
---------------------------------------------------------
Bill D. Casselberry ; Photography on the Oregon Coast
http://www.orednet.org/~bcasselb
[EMAIL PROTECTED]
---------------------------------------------------------
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .
