Search results for 'sensor cleaning' - page 86
IST DL Mirror Lenses
Niblue Well practice is the order of the day then. I like the lens though and it feels good in use on the DL. On another subject, I bought myself a large bulb-blower today to blow some dirt of the focussing screen - I hope never to get stuff onto the sensor. Given up now. The dirt is on th...
Posted by SPB on 01/05/2006 - 13:30
85mm primes on *ist DS
I'd appreciate any comments on experience with either the Jupiter 9 85/2 or SMC Takumar 85/1.8 (both M42 mount) on a digital body. Both I believe are well regarded on film cameras but I gather lens performance on digital can be different - something to do with coatings (or rather the lack of) on the...
Posted by Rowdy on 01/03/2006 - 11:24
85mm primes on *ist DS
Digital cameras need the light to hit the sensor from as close to perpindicular as possible. Any light that doesn't can cause chromatic abberations and it's for this reason that we see measures being taken now to address this with new lens designs, including measures internally to cut down reflectio...
Posted by niblue on 01/03/2006 - 17:01
Opteka lenses
Hi Ammonyte, nice photos.. I like #12. The lack of sharpness could be due to using ISO 3200. I'm going to have to look it up, but I think that digitals must somehow use less pixels to increase the ISO rating and therefore decrease exposure time. In which case, you are using 1/32 of the availab...
Posted by LiamD on 06/03/2006 - 18:04
Using bellows with the *istDS
I am trying to copy some slides with bellows (A) however due to the smaller size of the sensor in comparison with 35mm format I am unable to obtain a full frame copy using either 50 or 28mm lenses. Has anyone out there managed to achieve 1:1 copies? Of course I could try stitching frames in pho...
Posted by slofts on 06/03/2006 - 07:52
Aaaargh!!!! No! No! No!......
I think they are well beyond saving. Just send them to me for humane disposal :lol: I have a couple of lenses with a similar problem but its not affecting the images yet, not that I can see anyway. I for one would be interested to know the cost of a lens cleaning service and whether or not it is...
Posted by Mannesty on 13/03/2006 - 21:02
Zoom lens question - should i?
From the sigma website: ASP (Aspherical Lens) The aspherical lens complex allows freedom of design, improved performance, a reduced number of component lenses and a compact size. APO (APO Lens) In order to attain the highest quality images, the APO lens has been made using special low-dis...
Posted by Fernando Terrazzino on 25/03/2006 - 01:46
FA primes vs DA primes
This is my first post, so hello to everyone. I am new to photography (unless you count the SF7 I bought in 1989 with which I shot all of about 20 rolls of film before slinging it in the cupboard). I trip to New Zealand in Nov 05 prompted me to buy a *istDS with the DA18-55 and DA50-200 zoom lens...
Posted by PygmyTwittle on 24/03/2006 - 16:44
macro question - extension tubes vs a macro lens
I got a reversing ring for my Pentax-A 50mm lens and then I was cleaning out some boxes and I found a 28mm lens which I used on my old Minolta SLR camera. The 28 has the same 49mm filter size as the 50 and both give excellent results on the reversing ring. Together with my Sigma 50mm 2.8 macro lens...
Posted by golfdiesel on 28/03/2006 - 19:28
lens for group Photo's
Remember that the sensor is only using the center of the image circle. A 20mm lens will give you a moderate wide angle, there are primes down to 14mm available for the digitals.
Posted by Arthur Dent on 03/04/2006 - 23:35
'Digital only' lenses - are they a good investment
The growing range of 'digital only' lenses makes me wonder, are they really a good investment ? The current plethora of digital SLR bodies mostly have APS sized sensors, IE: smaller than 35mm full frame which has spawned a range of lenses to suit this reduced size, but these lenses exhibit vignet...
Posted by Mannesty on 08/04/2006 - 14:31
'Digital only' lenses - are they a good investment
Well, I hope they're a good investment, 'cos I just got one (Park Cameras, in stock at £299.99 + £6.99 P&P). I know what you mean though, but as the new Pentax is shown with a 16-45, hopefully we're going to be 'stuck' with the smaller sensors for a while yet. I bet Canon users are more worr...
Posted by Daniel Bridge on 08/04/2006 - 21:14
'Digital only' lenses - are they a good investment
I wondered about this too before I got into digital. But it appears as though Pentax is investing a lot into the DA lenses, so there's no need to worry about being abandoned in a useless lens format. So with this development in DA lenses it tells me that Pentax doesn't consider 35mm full-frame digi...
Posted by Joshua Hakin on 08/04/2006 - 21:46
'Digital only' lenses - are they a good investment
if they produced a camera with the larger sensor, no-one would feel the need to buy any new lenses. Dan
Posted by Mannesty on 08/04/2006 - 22:09
'Digital only' lenses - are they a good investment
Oops. if they produced a camera with the larger sensor, no-one would feel the need to buy any new lenses. Dan Excellent point and one which had not occured to me. I'm not actually sure who drives who in the digital imaging game. Is it the sensor manufacturers who decide what will be available...
Posted by Mannesty on 08/04/2006 - 22:12
'Digital only' lenses - are they a good investment
Good point. I personally would see no need to switch sensor size if the output quality of the APS sensor improves, as I'm sure it will in time.
Posted by Mannesty on 08/04/2006 - 22:37
'Digital only' lenses - are they a good investment
Check out this article: http://www.creativepro.com/story/feature/22468.html?cprose=daily Great info here! A couple comments made: "Canon and Nikon have proven that you can get excellent, perfectly usable images from an APS-sized sensor, and with Canon smartly addressing the lens selection...
Posted by Joshua Hakin on 08/04/2006 - 22:49
'Digital only' lenses - are they a good investment
I would surely buy it off your hands for more than a fiver! Current APS sensor quality and image size are at a good compromise for me now; I'm quite happy with my DS! :) I don't think I'll need any more than this for quite some time...
Posted by Flink on 09/04/2006 - 00:38
'Digital only' lenses - are they a good investment
The sensor is just film in a new guise. 150 years ago, film came in huge sheets. Around 100 years ago, Kodak introduced the "minature" 120 or 126 size (I forget which), and everybody flocked to the new, smaller, lighter, cheaper, format. Then Oscar Barnack had the idea of using cine f...
Posted by George Lazarette on 09/04/2006 - 00:51
'Digital only' lenses - are they a good investment
I think it's high time manuafacturers used AOV instead of focal length to describe a lens, but obviously a lens designed to fit cameras with more than one sensor size will need to mention more than one AOV. There's no really easy solution to this problem. I have the lens roadmap framed and hangi...
Posted by George Lazarette on 09/04/2006 - 10:55
