All Forum Comments
Comment by George Lazarette posted on 18-35 lens for £80 at 03/03/2005 - 11:47
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Comment by George Lazarette posted on Lenses for the 645 at 16/03/2005 - 12:07
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Comment by George Lazarette posted on 50mm/f1.7A aperture ring problem at 03/03/2005 - 11:51
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Comment by George Lazarette posted on Switching back covers mz-7 > mz-50 at 02/03/2005 - 05:13
However, with the lens stopped down to f8 or so, it is usually far too dark (for my eyes, at least) to make out any significant difference in depth of field.
So, I never use it. On digital cameras, the LCD gives a far better indication. I believe DOF preview won't stay around much longer on digital cameras.
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Comment by George Lazarette posted on ist DS depth of field preview. at 27/02/2005 - 10:20
So, an old M lens is a good buy, and certainly better than a cheap Sigma.
Best focal length is probably 200mm, followed by 100mm and then 50mm. However, 200mm macros are hard to come by, so my advice would be a Pentax-M 1:4 100mm as offering the best quality/price ratio. The "A" version is obviously slightly more convenient.
With macro, you usually want to maximise the very limited depth of field, so good performance at small apertures is usually much more important than having a large max aperture.
Coincidentally, I am selling my A 1:4 100mm (because I also have the FA 1:2.8 100mm), but I would give the same advice even if I wasn't!
The Tamron 90, as Matt said, is also highly regarded.
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Comment by George Lazarette posted on macro lens at 26/02/2005 - 03:47
If you haven't yet bought the unit, and don't want to shell out quite a lot of money, then you might find that a non-digital gun such as the AF280T or the AF240Z will give reasonable results for not too much money.
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Comment by George Lazarette posted on *ist DS and AF220 Flash compatibility at 26/02/2005 - 02:59
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Comment by George Lazarette posted on RAW file format specification at 12/04/2005 - 20:07
I know nothing about the Sigma, but if it's a cheap one, don't expect it to be any better. Quite the reverse, in fact.
In your shoes I would keep looking for a prime. You will often want to crop your pics because whichever lens you buy, it will never be long enough. And cropping means you need a sharp lens.
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Comment by George Lazarette posted on Telephoto, 80-320,sigma 170-500 at 26/02/2005 - 03:32
In addition to Kim's link, you will find this very useful:
http://www.bdimitrov.de/kmp/
Welcome to the club.
George
Comment by George Lazarette posted on How do Pentax K lenses compare to Canon FD and Carl Zeiss T* at 26/02/2005 - 05:12


For those who haven't taken the plunge, all you really need (assuming you have Pentax lenses already, and a computer) are the body (£599.99), a card (say £50), some NIMH batteries (£9.00 approx inc charger from 7day Shop) and a card reader (£6.00, if your computer doesn't have one). Total £665.00. It'll pay for itself in a year or less.
Of course, if you have a couple of good bodies, they'll offset the price further. Buy an old Spotmatic for occasional nostalgic forays back into film.
Go on, you know you want to!
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