Search results for 'sensor cleaning' - page 116
will the lens fit.
thanks guys was getting lost with all that sensor stuff. There is a km on ebay with a 18-55mm lenses for £398, it is 8mths old. Does this represent value: for money.:? Not compared to this K200D: http://cgi.ebay.co.uk/PENTAX-K200D-10MP-DIGITAL-SLR-CAMERA-K200-D-K-200D_W0QQitemZ300397590051QQcmdZV...
Posted by iceblinker on 23/02/2010 - 10:08
Decisions decisions...LBA
Have not tried the 77mm but I can't beleieve it is worth twice the price of the 70mm (which is superb). Saying that if you believe Pentax may someday bring out a ff camera and you would buy one then maybe it is. :) The DA 70 does actually cover a FF circle, here is a shot I took on my MZ-S, scanned ...
Posted by RichardDay on 25/02/2010 - 12:05
Cheap Pentax Fit Fisheye Lens Any Clues?
That does sound like the Samyang then tempting but having used a Pentax fisheye I think I'll wait. Also a little research suggests it's not very fishy on an APS sensor. That may be unfair but I don't think it's a patch on the Pentax in any way that have seen from sample shots. Cost is the...
Posted by mikew on 25/02/2010 - 16:54
Cheap Pentax Fit Fisheye Lens Any Clues?
That does sound like the Samyang then tempting but having used a Pentax fisheye I think I'll wait. Also a little research suggests it's not very fishy on an APS sensor. That may be unfair but I don't think it's a patch on the Pentax in any way that have seen from sample shots. Cost is the...
Posted by PeteL on 25/02/2010 - 17:43
50mm vs 55mm DA
Most primes have simple barrel-shaped hood, look at the DFA100mm, DA*200 & DA*300. I believe they think it's the best design for prime lenses since they can precisely make it fit the coverage of the lens instead of the sensor we see with zooms. It's just a different way of doing things. They pro...
Posted by Anvh on 26/02/2010 - 14:44
What’s your favorite focal length?
Andrew, from what I understand you use a 28mm for the shot of yours? When I look at the photo it says 43mm and that's not correct because you're using a 28mm lens. I'm saying this because the shake reduction needs to have the correct focal length to work properly or else it mgith even blur your ...
Posted by Anvh on 26/02/2010 - 13:54
P30T Lenses
Yes, sorry I got it the wrong way round above. The P30T's Program mode should work lenses without an aperture ring. I'm not sure about its Av mode. I only had a P30 (not T or n) that didn't have Av mode at all. Nope, you were right the first time! Thanks to the crop factor caused by the DSLR u...
Posted by Dangermouse on 28/02/2010 - 23:26
43mm Ltd
It is actually normal for lenses to behave differently (in terms of front/back focus) under tungsten lighting compared to daylight or flourescent light. Often you won't spot the change as the depth-of-field is sufficient to mask small discrepancies, however, when you use a lens with a very wide aper...
Posted by Anvh on 03/03/2010 - 21:16
what lens do i need
Hi Defoe, What do the lenses do? A) Focus the light onto the sensor. Do I have to many of them? A) You can never have too many lenses :lol: Do some of them do the same job? A) Yes. Am i confusing myself with so many? A) Probably, but keep them all anyway; see below. Going on holiday soon wh...
Posted by davex on 06/03/2010 - 11:59
what lens do i need
Hi Defoe, What do the lenses do? A) Focus the light onto the sensor. Do I have to many of them? A) You can never have too many lenses :lol: Do some of them do the same job? A) Yes. Am i confusing myself with so many? A) Probably, but keep them all anyway; see below. Going on holiday soon wh...
Posted by defoe8 on 06/03/2010 - 12:18
what lens do i need
I would agree with the suggestion of which lenses to take on holiday, those two will offer the most useful spread. The 18-55mm would have been sold with the camera, it's a very well-regarded lens and you can get excellent photos with it. This lens covers wide angle through to a short telephoto an...
Posted by Dangermouse on 06/03/2010 - 12:20
Someone tell me I don't need a SMC-K 50mm f1.2
I've already got a FA50 f1.4, and I find it too zoomed up! A change in aperture won't change that :| The only thing a f/1.2 does over a f/1.4 is that at f/1.2 the field where in everything is harp is smaller and that more light falls onto the sensor so you could faster shutter-speed and lower iso b...
Posted by Anvh on 09/03/2010 - 17:19
Someone tell me I don't need a SMC-K 50mm f1.2
Please stop with the crop factor thing, if Whelmed has only use an APS-C camera then a crop factor wouldn't mean a thing for him only complicating things. And burden, what burden? An 400mm f/4 is certainly lighter then a 600mm f/4 :wink: So Whelmed if you find photography hard enough already an...
Posted by Mongoose on 10/03/2010 - 12:28
Someone tell me I don't need a SMC-K 50mm f1.2
K10D I was only joking :D You said burden and I translated that to the burden of carry a FA* 600mm f/4 lens, don't take it so serious :wink: I agree that for people who have never used FF or 35mm film cameras that they would not need to worry, but what is wrong with knowing the actual effect of ...
Posted by Anvh on 10/03/2010 - 15:47
fogged lens
did a great job of cleaning fungus from a 200mm f4 for me, charged around £40. Might be worth sending an email to see if he's able to sort your lens out?
Posted by Dangermouse on 15/03/2010 - 21:12
[probably] Yet another focal length question..
The crop factor varies between manufacturer and even body models and is dependent on te sensor used. Pentax are 1.5 (nominally) whereas Canon are 1.6 on the 1000D and 1.3 on the 1D mk III The S90 spec gives the following: 6.0 - 22.5 mm (35mm equivalent: 28-105mm) which means a factor of aro...
Posted by polchraine on 18/03/2010 - 23:28
UV filters.
Glover this is indeed a can of worms like Mike says, it has been discuss quite some times now. UV filter will have limited effect on digital because there is an UV filter in front of the sensor, so basically you've a piece of glass in front of your lens making flare more of a problem and costing ...
Posted by Anvh on 20/03/2010 - 21:47
UV filters.
Should you not carry out the same tests outdoors, that is where the UV light is. I would have thought that indoors even standard glass in windows would filter out some UV. That will be next, my main point of this though was to find out wether leaving them on permenantly was a wise choice and if it a...
Posted by Glover on 22/03/2010 - 12:08
How do handle your lenses when shooting?
Just read a blog on street photography techniques that said the true pro would quickly spot the amateur by their use of front lens caps on lenses that are in the bag. So it's official, I'm an amateur:D! I try to protect my lenses as much as possible (though I mostly don't use protector filters - ...
Posted by Dr. Mhuni on 22/03/2010 - 06:34
FA v D-FA 100mm 1:2.8 Macro
At least we know where the DFA has his genes from :) It could be they improved the way the light hit the sensor, I believe they said the DFA was optimized for digital. Digital sensor like to have the light fall on the sensor as straight as possible.
Posted by Anvh on 24/03/2010 - 17:42
