Search results for 'sensor cleaning' - page 174
Sigma AF hunting issue.
I've had the same lens for over 15 years and not had any issues, Have you tried the usual default option of cleaning ( ideally with Isopropyl Alcohol ) both the lens contacts inc the complete mount as well as the camera mounts / contacts ?
Posted by Chrism8 on 21/06/2025 - 13:10
Schneider Kreutznach Xenar 3.5cm conversion.
Err. No. It is screwed on tight and It takes a little bit of lathe work - fortunately, not on the lens components, although that wouldn't be the first time since all of these beasties are unique and you only have so much space to play with - about 48mm. Neither will any donor lens of less than 50mm ...
Posted by davidwozhere on 21/08/2026 - 22:59
Schneider Kreutznach Xenar 3.5cm conversion.
Err. No. It is screwed on tight and It takes a little bit of lathe work - fortunately, not on the lens components, although that wouldn't be the first time since all of these beasties are unique and you only have so much space to play with - about 48mm. Neither will any donor lens of less than 50mm ...
Posted by smc on 22/08/2026 - 19:45
Schneider Kreutznach Xenar 3.5cm conversion.
I think you will find a problem with 50mm. You simply can't mount it sufficiently close to the sensor. You MIGHT get it to focus as a dedicated macro lens?
Posted by davidwozhere on 26/08/2026 - 21:51
SLR digital camera
Pentcontax, Canon thumb wheel - urghurgh! Makes me go all shivery at the thought! If you look carefully, the "wheel" is appears to be the focus selector (around the OK button), to choose between auto, spot, and selected. The aperture wheel is on the top right corner of the back - in the sam...
Posted by MattMatic on 28/03/2003 - 09:51
SLR digital camera
News on the JCTN : October 17: Pentax plans to market lens-interchangeable digital SLR next spring: Pentax Corporation (new name for Asahi Optical) is planning to enter lens-interchangeable digital SLR camera market next spring probably, according to the company. The camera will use APS-form...
Posted by Anonymous on 24/11/2002 - 20:54
SLR digital camera
Just to add some more thoughts... It was good to see the announcement in the PU mag that arrived yesterday :) The price seems to have a large variance, but still, that sounds reasonable. It would be nice if Pentax could provide for upgradable CCD chip/module for all those who are picky about t...
Posted by MattMatic on 10/01/2003 - 10:02
SLR digital camera
Just by way of comparison, and remembering the *istD uses the same sensor as the Nikon D100... (List prices taken from Park Cameras web site) £1700 Nikon D100 £1500 Canon 10D £1700 Fuji S2 So, from a list price point of view, the Pentax is competitively priced. Yet, the fact is that all t...
Posted by Anonymous on 03/09/2003 - 14:44
SLR digital camera
Ooops, In my haste, I forgot the link: http://www.dpreview.com/news/0309/03092201pentaxistdsamps.asp There's also Phil Askey's comments on the main page: Pentax *ist D production samples posted Exclusive: I have just posted a gallery of 25 sample images from a production Pentax *ist D. This...
Posted by MattMatic on 23/09/2003 - 11:20
External Flash
Enya, For your information: I have a Canon S30 digital camera that also has no external flash. However, I also have other Pentax SLRs and the AF360FGZ flash gun. This flash has a built in slave feature that works very well indeed. Before that I tried other "generic" flash guns using a little s...
Posted by MattMatic on 17/03/2003 - 09:53
New *istD Digital Body
Lurach, It's no digital trick :shock: Think about it - 35mm has a frame size of 36mm x 24mm. Imagine the hole behind the shutter where the film sits. Now replace the film with a CCD (ie digital film). However, that CCD is quite a bit smaller than the whole 35mm frame. The ratio is the same (ie...
Posted by MattMatic on 30/05/2003 - 20:03
My first *ist-D Sample Photos
Malcolm, Your answer is entirely sensible :) I'm sure you'll have fun catching up - especially now with cutting technology. With your AF400 - have you had a good look at the battery contacts? They've probably corroded a little. If they're not shiny, you can get these neat little glass-fibre p...
Posted by MattMatic on 08/10/2003 - 21:02
My first *ist-D Sample Photos
Lurach, ...istD camera that istD great fun to use :) So far, so good. The only peculiarity is the amount of images I'm taking right now :roll: Battery life is splendid - I'm using 2200mAh batteries (from 7dayshop). Flash exposure is spot on. Autofocus is fast. I only have a few minor niggles ...
Posted by MattMatic on 11/10/2003 - 22:01
*ist D bad pixels
Malcolm, Thankfully I don't have any (yet). All digicams have issues with stuck pixels (yes even the Canons!). Some of the cameras can detect a stuck pixel, or profile their own sensor and map it out. AFAIK, pixels can grow defective too, so it's not a case of just getting a 'perfect' sensor. ...
Posted by MattMatic on 16/10/2003 - 11:39
*ist D bad pixels
I've been refraining from further posts because I keep doing more tests. Dark subjects certainly appear to be a key factor. I have established that there are four sensor problem areas and that the file format, ISO rating, shutter speed (short of burning everything out!) all make no difference. Th...
Posted by malcolmk on 17/10/2003 - 14:24
*ist D bad pixels
Malcolm, Just to allay your fears (a little at least), sensor problems run across the board, irrespective of make. The CCDs are cutting-edge technology and sometimes they do go wrong :( It's not Pentax, per se. You could just as easily have had the same experience with any of the high end DSLRs. ...
Posted by MattMatic on 17/10/2003 - 14:41
*ist D bad pixels
Hi Lurach, I too gave the 'first generation' issue some thought but I decided Pentax were not new to digital and not new to SLRs either so the problem might be small if there was one at all. I remember my LX was 'first generation' back in nineteen eighty whatever it was and after fewer than 12 mo...
Posted by malcolmk on 18/10/2003 - 11:20
*ist D bad pixels
Shawn, Sounds like the Pentax guys gave you a hard time. However, all in all, it's not really Pentax that's at fault (just the fact they didn't recognise the problem). Any manufacturer of digital camera will have the same problems - and the response from each company will certainly vary ;) Ho...
Posted by MattMatic on 27/11/2003 - 16:44
*istD compatibility & FAQ
Since many of the same questions have been asked, I thought I would post a general compatibility and FAQ thread. Lenses First of all, the 18-35mm FAJ lens is a real 18mm. If you put it onto the film version *ist you will get 18mm ;) The focal length of digital and film is the same. The differen...
Posted by MattMatic on 20/10/2003 - 14:07
Accurate colours when printing
It is possible to obtain a sensor that will measure the output of the monitor and calibrate it, but we are talking expense! Secondly, someone advertises a CD with print that you can use to correct overall colour casts in the print. The idea is that a standard print is supplied and you make adjust...
Posted by johnriley on 18/11/2003 - 22:27
