Algernon

Joined: 22nd May 2010

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Algernon
Dangermouse wrote:
It went for £23 in the end. Can't help thinking he'd have got more if he'd been able to wind his attitude problem in!
Bet he can't figure out why he got 277 VIEWS and only 4 BIDS

Comment by Algernon posted on Not a Fan of Pentax? at 21/04/2011 - 20:58

Algernon
Just tried a quick test with a 50mm f/2 lens and a Super-A and MX.

Opened a 35mm thick internal door so that I was looking at the thickness and face of the door at about 45deg. Had to move back to about 1.5 - 2m to get the thickness in the split image. The image lines up on the split on both sides of the thickness of the door, The distance will be 0.707 x 35 = 25mm approx. so the split screen can't be very accurate.

I also noticed how dim the MX screen is compared to the Super-A almost unusable inside the house, but the Super-A is very bright
I've another MX with a screen in it off the Limited Edition LX, I'll
have to see how that compares.

Comment by Algernon posted on Suggestions to Pentax at 21/04/2011 - 19:21

Algernon
Thanks John...... Handy to know

Comment by Algernon posted on Z1-p body at 21/04/2011 - 19:10

Algernon
The K10D supports PZ OK and I'm sure my K20D will, never tried it
though..... I'll have to dig out the old 28-80mm which has PZ
to check. I used to use it quite a bit a few years ago on longer
zooms.

Comment by Algernon posted on Z1-p body at 21/04/2011 - 18:43

Algernon
I've never actually used a Katzeye and it would be nice if they were better than other screens, although I think they are just cut from other screens. A 100mm lens will pop into focus better than say a 50mm or 35mm, possibly you don't even need the split screen with it due to the positive way it pops in and out. I've just tried a 50mm on an OM2 which has a very bright and large screen and I couldn't get better than +/-25mm. I could focus on the lettering on the box via the pseudo ground glass and see it go unreadable at less than +/-25mm.

I've also posted this link before where they say focusing just isn't reliable by any means. All systems rely heavily on DOF.

When I've been testing lenses I've found the 2x Refconverter 'A' to be right about 1 shot in 4 at f/4 and below. I've posted this before.... this was focused using a 2x Refconverter 'A' MF and is right to the mm

Comment Image


I was doing some quick tests yesterday with a 50mm 'A' f/1.7 and 24-50mm 'A' f/4 just of a satellite dish using the green diamond to focus. It did seem that the Zoom was sharper than the Prime, but when I looked closer at the adjacent brickwork and some climbing roses the Zoom was focusing quite a bit in front and the prime quite a bit behind, so I'll have to repeat the test probably using an Eye-Fi card to check and adjust the focus for each shot. Very surprised though how good the Zoom is at f/4 and f/5.6 (better than a top prime) They were identical at f/8. The green diamond should be more accurate than any form of manual focusing because it's detecting an electric signal.

It would be nice if someone could actually do a proper test with a split screen?

Comment by Algernon posted on Suggestions to Pentax at 21/04/2011 - 18:22

Algernon
Unless it's mentioned in the specification for the Z1-P
I wouldn't think so.

Also have a look at the Dimitrov site to see when the 1st lens
with that motor was introduced. If it's not an FA lens it's
most unlikely that one would work.

Comment by Algernon posted on Z1-p body at 21/04/2011 - 17:35

Algernon
DrOrloff wrote:
I bought a K20 which was faulty and eventually exchanged for a K7 which was faulty which was exchanged for another K7 which I traded in for a K5 which was faulty and exchanged for another K5 which was faulty and will be exchanged for another K5.
Reminds me of Italian Cars!

Comment by Algernon posted on K5 number 3...? at 21/04/2011 - 11:18

Algernon
I might buy one shortly if the number of reported problems die down.
I'm a bit concerned of what's happening to all the one's that have
been returned. If they sell them off as refurbs I wouldn't buy one
but at least we'd know what happened to them. I just hope that they
don't get sent out as NEW cameras

Comment by Algernon posted on K5 number 3...? at 21/04/2011 - 09:37

Algernon
Smeggypants wrote:
Algernon wrote:
It's a lot easier than that to check a split screen. Put it on a tripod about 3 ft high. Focus on something vertical say a gap in a door/frame. Tilt the camera/tripod to the top of the door. If it still shows it's in focus..... throw it in the bin
Ahh you mean the split screen has a wide DOF if it's faulty?

I was thinking getting the distance to sensor, distance to screen exactly the same
No I meant a Split Image Screen isn't very accurate. I've never used it on film for that reason. I always focus on the plain part of the screen.

You could also confirm this by focusing on a box about 1m away from the camera with the split screen and then moving the box 50mm backwards/forwards and it will probably still line up indicating that it's still in focus according to the split screen.

Comment by Algernon posted on Suggestions to Pentax at 21/04/2011 - 09:28

Algernon
Anyone with a basic knowledge of statistics could collect the information of how many people on here bought K-5's and how many of those had a replacement plus how many of the replacements were faulty. Someone did post the details of the probability of the 2nd camera being faulty based on an assumed percentage of total faulty cameras. If the percentage of cameras being faulty was low the chance of a replacement also being faulty would be very low, but I can think of at least 5 people on here who have had 2 or 3 cameras with staining and that would indicate that there was/is a high percentage of faulty cameras. It's put me right off buying one, but the one's being produced at present might be OK.

Comment by Algernon posted on K5 number 3...? at 21/04/2011 - 08:57

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