I would definitely think you are wrong, but I'll let Matt explain. He deals with this sort of thing every day.

G

I suspect there is a limit.

G

I don' think so. I might have been talking about its expected life, but not where it resets its image numbers.

It's fairly obvious that a number in the form 0001 will go up to more than 9999.

G

imgp0001.pef

Four or five times on a *ist D.

It's irritating that they didn't provide one more order of magnitude.

G

Keep it. One flash good; two flashes much better.

G

Certainly a very interesting read. Thanks.

G

Good idea.

G

Good point.

G

One thing to remember is that the Pentax sensors are significantly smaller than the 35mm frame. When Cokin says that 20mm is the widest lens you can use, they are (probably) talking about film. You should be able to use a wider lens on digital without vignetting.

I use a 49mm step-down ring on my 100mm macro lens which takes a 58mm filter, and there is no problem.

G

The two common filters that can't be replaced by software are the polariser and the UV/skylight filters. (I'm talking about colour, not monochrome.)

These provide the sensor with more information, whilst other filters tend simply to change the colour balance or add those "special effects" so beloved by wedding photographers and others of like mind.

One other filter that does have a use is a non-graduated ND that can be used to allow the use of a slow shutter speed in strong light.

G