Search results for 'sensor cleaning' - page 98
Which lense??
Try drawing it on a piece of paper. The image circle projected by a lens is always round as the lens is round (sometimes there are internal baffles to make a square aperture on say the M 100mm F4 but lets ignore this). Now draw a rectangle in the box, not a square, make sure that the corners touc...
Posted by hefty1 on 14/06/2008 - 22:23
Test kit v 1.7 smc 50 mm
The 18-55 MkII is supposed to have a higher resolution to match what is achievable with a K20D. So do you think Peter there is any point upgraiding the lens when I get my k10. Would I see any benifit or is the lens simply designed to work with the new sensor in the k20.
Posted by philstaff on 13/08/2008 - 21:11
Test kit v 1.7 smc 50 mm
The 18-55 MkII is supposed to have a higher resolution to match what is achievable with a K20D. So do you think Peter there is any point upgraiding the lens when I get my k10. Would I see any benifit or is the lens simply designed to work with the new sensor in the k20. On a K10D, I doubt you'd noti...
Posted by Mannesty on 13/08/2008 - 22:26
Problem with Tamron Macro
Thanks for the input chaps. The lens still seems to perform well in all other respects so I may just learn to live with it. Mongoose: Yes I tried it without a filter. Clarky: Yes it is the same, do me a favour and try yours for me. just point it at a plain wall or piece of card the same a...
Posted by fatspider on 03/07/2008 - 22:45
Kit lens replacement
Hello everyone, This is my first post here. I have nevertheless been lurking for some time soaking up information, but saw your message which encouraged me to register and share my own experience since we are somewhat in the same boat. Shortly after Christmas I bought a Pentax K10D as an upgr...
Posted by Shaky on 06/07/2008 - 18:53
70-200mm Tamron or Sigma
AFAIAA, neither lens is actually available as yet, despite what the stores show. They both have projected release dates in August, though I contacted Intro2020 last week and they still have no idea when it will ship. The Sigma has also been delayed at least once so far. As to which is better - pr...
Posted by chirpy on 07/07/2008 - 22:49
2nd hand Macro Lens for K100d
i know nothing about bellows and extension tubes and, quite frankly, they scare me! There is absolutely no need to be scared of extension tubes. All they do is move the lens further away from the camera, which effectively moves the point of closest focus closer to the lens, which means you get a ...
Posted by ChrisA on 18/07/2008 - 15:17
2nd hand Macro Lens for K100d
ok... i have got a 50mm 1.7 on the way as well as the extension tubes (it was me who won them on ebay, Chris!) All packed up - I'll try and get them into the post today. :) I must admit, I expected them to go for a lot less than that! :oops: one more question... how do extension tubes/bello...
Posted by ChrisA on 19/07/2008 - 13:18
31mm or 77mm ltd's ?
Great point hefty! I haven't considered the 43mm for a very simple reason; I have an FA50 f1.4, and this is so close to the 43 that it really would be a matter of 1 step backwards to take the same shot. Step which i don't mind taking, as the 50 is a fantastic lens, and not only very fast, it is i...
Posted by nathanever82 on 15/07/2008 - 17:02
31mm or 77mm ltd's ?
Each pixel on your digital sensor is effectively a small well that needs to catch photons, if the photons hit the well at an angle then it won't fill up as efficiently as if they were hitting it from straight on. Lenses that are specifically designed for digital should (in theory) direct all the li...
Posted by hefty1 on 15/07/2008 - 18:13
31mm or 77mm ltd's ?
I agree with Matt that the 24-90 is an exceptional lens. On short acqaintance it might well seem to be a match for the 31 Ltd. However, I owned both at the same time before getting my K10D (and for a short while after), so they were used chiefly on the *ist D, and even on that relatively small s...
Posted by George Lazarette on 15/07/2008 - 22:52
Bargain Pentaz smc-f 50mm 1.7 lens Broken :(
The SMC Pentax-F 50mm 1:1.7 is a fine lens, I have one and it produces excellent results. Don't bin it yet. I repaired an A series 50mm 1:1.7 lens once, but I wouldn't attempt it again. It had a different problem to yours though, the aperture ring would only move part way round the scale due to a...
Posted by Mannesty on 21/07/2008 - 22:23
Bargain Pentaz smc-f 50mm 1.7 lens Broken :(
A lot of information! ill try cleaning the contacts. if that dosent work reversing it may have to do!! Still upset thought it was a bargain but got screwed :evil: if cleaning dosent work i may send it to get checked cost me 10pound but if its simple then maybe worth it !! thanks for the ad...
Posted by ayazd on 22/07/2008 - 18:39
Is this Fungus?
Excellent service. There are some good sellers around. I'd say you can't get any fairer than that. You'll lose nothing by trying to clean it. The fungus is most likely on the insisde but if it's on the outside, try pure acetone (nail varnish remover) or methanol (Eclipse lens/sensor cleaning flui...
Posted by Mannesty on 28/07/2008 - 16:06
Macro Advice/Tutorial to get the best out of S-M-C Macro Takumar 100/4
Richard I can't see your pic either. But reading the exif info you have posted, 800iso and 1/30 it very much sounds that you don't have a flash. I would have a flash on 90% of the time when doing macro, even in bright sunshine you may need it if your subject is in shadow. And get yourself a go...
Posted by Clarky on 21/08/2008 - 11:42
Need lenses for K10D
Well the which, as Reuben says above, will give you a wide angle with quite a bit of barrel distortion - nothing that can't be sorted in PP though. I don't know if it would give better results than the kit lens but it will be 2mm wider, half a stop faster and useable on 35mm film (or a future "ful...
Posted by hefty1 on 30/08/2008 - 00:33
Need lenses for K10D
I don't know if it would give better results than the kit lens but it will be 2mm wider, half a stop faster and useable on 35mm film (or a future "full frame" sensor). In my opinion, the de-fished the Zenitar is a lot better than the kit lens and there are many example shots on the "other" Pentax ...
Posted by Reuben0 on 30/08/2008 - 10:16
Fisheye - Circular & Diagonal - Difference?
Yes. But assuming you would like it explained (sorry, tempted to do a 'George' and leave it at 'Yes' :roll: :lol:), a circular fisheye will produce a circular image on your sensor, like Peter Elgar's shot here: https://www.pentaxuser.com/photo/user-770/Fisheye-Cyclist-1182 A diagonal fisheye...
Posted by Daniel Bridge on 23/09/2008 - 15:18
28mm shift
I saw one on e-bay recently I think it was a Hartblei 55mm and the BIN price was $1400 The Hartbleis have tilt as well as shift though, which makes them a far more interesting prospect than the Pentax with shift only. Supplies of their own Super-Rotators have been on the thin side lately ( ) but you...
Posted by hefty1 on 26/09/2008 - 00:53
28mm shift
Hello Kris, I've got one of those. In my film days it was just about my favourite lens. I would even carry it on backpacking trips as the only lens on an LX. I agree with John that 28mm on an APS-C sensor is not that wide and so it has limited use for architecture. I also found that the ma...
Posted by Bob and his Pentax on 26/09/2008 - 01:25
