Comments made by johnriley - Page 512

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The 18-55mm WR works well for me, usually at f/11 or f/16. Wide open it will be softer, but that might be good for portraits. It suits this sort of thing:

I prefer the 18-135mm, which is sharp and wiry and gives a nice gritty feel to the images. That suits this type of image:

Comment by johnriley posted on Photography Blog Review at 27/11/2013 - 15:56

He's a bit painful to watch as he doesn't seem focused and keeps repeating himself. However, his message seems clear enough.

Comment by johnriley posted on Photouniverse K-3 review at 27/11/2013 - 13:06

I have always felt the problem with Cokin style filters is that they are very vulnerable to reflections. OK, we can use their lens hood, but what a cumbersome outfit it makes.

A screw-in circular polariser can be used quite successfully even with original Pentax hoods, just remove the small window so that the filter can be turned.

Comment by johnriley posted on Polarising Filter - Screw or Cokin? at 26/11/2013 - 23:45

Well, my mum was taken into hospital today so I've not been around. What a horrible mess of a thread to return to.

Utterly shameful.

Comment by johnriley posted on DXO K3 Scores are out at 26/11/2013 - 23:41

Algi, I'm afraid you're incorrect. Sorry to be blunt, but I'd advise you to start again and read a book about lenses.

Telephoto lenses don't have any effect on perspective at all. It's the fact that to shoot a given subject we need to move further away that changes things.

Enough wibbly wobbly perspectivey stuff I think. We could be here in 50 years with this.

Comment by johnriley posted on Something to ponder! at 26/11/2013 - 08:38

I think you're right to look for balance jules, because we have a very sturdy, new, fast K-3 with magnesium alloy body against the polycarbonate bodied Nikon and I don't see why they need to be exactly the same price to compete.

Others elsewhere are seeing the advantages of Pentax while on the Pentax forums quite a few are only seeing the disadvantages. If indeed in this instance these figures are even a disadvantage.

Are we making images or playing Top Trumps?

Comment by johnriley posted on DXO K3 Scores are out at 26/11/2013 - 07:49

It's the same for all marques.

Comment by johnriley posted on K3 not auto focussing with two Sigma lenses in live view at 25/11/2013 - 22:32

Another deletion, wrong date.

Comment by johnriley posted on Monthly Competition #17 - TREE Competition at 25/11/2013 - 22:14

The point I was making Jeff was that as cameras improve, so we should really re-test all lenses with the new cameras. Not a very practical proposition I fear.

It was never a problem with film as testers either used the aerial image from the lens or a very fine grained film such as Kodak Technical Pan. At one time that was a relatively stable test material over many years.

Comment by johnriley posted on DXOMark scores at 25/11/2013 - 22:11

It's the Sigma lenses that are out of synch, nit the K-3. Sigma apparently don't pay for a licence that gives them access to Pentax technical information, they "reverse engineer". The consequence is that when a new body comes along there's no guarantee that all the lenses will fully work with it.

Comment by johnriley posted on K3 not auto focussing with two Sigma lenses in live view at 25/11/2013 - 21:20

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