Comments made by johnriley - Page 1552

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The reasoning is that later issues of the M series instruction booklets specifically state do not use Lithium batteries. The A series do not have the same prohibition.

It could be voltage, heat generation or gas build up that's the problem, or at least a potential hazard, but unfortunately Pentax do not elaborate.

I would say that as it's no problem to use the correct batteries then it's good advice to follow.

Comment by johnriley posted on Pentax ME trouble shooting at 13/01/2010 - 22:11

The new Samsung camera will have a K mount adapter from launch, according to AP. No AF though with the adapter.

I wonder who makes the camera and lenses?

Comment by johnriley posted on Samsung GX. No . . .comeback. . ? at 13/01/2010 - 16:09

Quote:
I don't suppose one of them happens to be a Voigtlander Bessa II

Hopefully with Apo-Lanthar lens.....

Comment by johnriley posted on Your first camera at 13/01/2010 - 16:07

For most macro work we don't need AF. Manual focus is more convenient, certainly for static macro subjects.

However, it's possible to use a 50mm macro as a general 50mm lens anyway, so it might have advantages there.

Comment by johnriley posted on SMC Takumar 50mm macro v FA50 macro at 12/01/2010 - 20:22

The M series version is quite rare because it was quite late in the day for M lenses and was soon replaced by the A series lens.

It is actually a very good performer, but I suspect not one of the lenses that excites buyers.

The best thing is to put it on eBay with a modest starting price and wait and see. It might only fetch £20, but sometimes these things surprise us and it could always fly....

Comment by johnriley posted on Pentax M 24-50mm f1:4 zoom Value? at 12/01/2010 - 14:38

According to Pentax instructions, Lithium cells are not suitable for the MX. As always of course they don't say why, but it could be either too high a voltage or heat generation problems.

The best option for the M series are Silver Oxide cells, and Alkaline ones if you can accept the shorter life span. 1 year at least for Silver, 6 months for alkaline.

Comment by johnriley posted on Pentax MX Users at 12/01/2010 - 13:38

From 1960s onwards I would guess, but Elicar macro lenses did have an excellent reputation. I wasn't aware of the 50mm, the 90mm being the usual one.

I would snap up one if I ever found a good one. Sadly they are quite rare and even rarer in nice condition.

Comment by johnriley posted on Elicar 50mm 2.8 macro at 12/01/2010 - 10:07

The FA lens is more complex because of the wider maximum aperture. Both are fine macro lenses and in practical terms I doubt that there will be any difference in quality between them.

Comment by johnriley posted on SMC Takumar 50mm macro v FA50 macro at 11/01/2010 - 23:48

Ah, but the f1.4 versions of Nikon and canon 50mm primes are not much adrift from the Pentax price. I think the Sigma might even be more expensive.

Comment by johnriley posted on SMC Pentax A 50mm 1.7 prime lens at 11/01/2010 - 17:09

I can't see that applying. If I wanted to make a calendar of classic cars I don't need the permission of all the manufacturers. If I wanted to make a calendar of buildings there wouldn't be a problem either, as long as the images were shot from "publicly accessible land".

Don't take my word for it, take the word of the English Heritage guidelines for their Images of England photographers.

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