Search results for 'sensor cleaning' - page 88
'Digital only' lenses - are they a good investment
wasn't the 645D supposed to be full frame 6x4 though? so it's sensor wouldn't fit in a K mount body.
Posted by Mongoose on 26/08/2007 - 12:11
Extension Tubes
Carrie, The Lensbaby you either love or you hate. Personally I don't like it too much :P It produces a very "arty" looking image, but I prefer genuine macro. And at around £70 I don't reckon I'll use it much! With a DSLR you have as much, if not more, control than you have on your MZ-6...
Posted by MattMatic on 25/04/2006 - 14:36
D-FA 100mm Macro
Have to admit that I've never actually tried one of the new D lenses, as there are none produced as of yet that I require at present. Should the need arise for a new lens within that range I sure will check them out. When I bought my *istds I opted for, as a main lens, the Sigma 20-40mm EX ASPH f...
Posted by genesisphil on 17/05/2006 - 14:46
D-FA 100mm Macro
May just be worth mentioning whilst we are on the subject of macro/extreme close ups that this is when you find out just how much dust can get onto a DSLR sensor no matter how careful you are. Because you are focussing so close and hopefully at a very small aperture to get the required DOF, the mag...
Posted by genesisphil on 19/05/2006 - 07:43
D-FA 100mm Macro
Philip, As far as I'm aware it's just down to the aperture used. I can get loads of dust spots and specks when using f/22 on landscapes. The worst is when using a pin hole! This showed up just how filthy my CCD was :) However, it does also depend on having a smooth area to notice the dust spo...
Posted by MattMatic on 19/05/2006 - 09:19
D-FA 100mm Macro
Hi Graham, Since getting my 'D' a year or so ago, I've really caught the macro bug, first using a Pentax 50mm (f/1.7) with extension tubes, then getting a Sigma 105mm. The 50mm was great, and I still use it occasionally, but I much prefer using the Sigma for insects - the greater working dista...
Posted by Daniel Bridge on 18/07/2006 - 19:05
D-FA 100mm Macro
Thanks Brian - good price. You having it delivered? I could go and pick it up for you if you want, not far for me really, and I have a friend who's moving to Edinburgh in a few weeks, she could bring it with her, unless I forgot to pass it on... :wink: No trouble, really :D Hoped to have a lo...
Posted by Daniel Bridge on 19/07/2006 - 16:25
50 - 200 DA
The old rules and expectations are being flouted daily by new lens designers. One reason is the smaller APS-C sized sensor, which is easier to design for in some respects. There are lots of other reasons - new glasses, aspheric elements, etc. I've seen Sue's pics from her new 50-200 and it's just...
Posted by johnriley on 25/06/2006 - 08:41
FA 20-35mm or DA 16-45 on digital
The 45-125 gives a range of angle of view on the digital cameras which is similar to the popular 80-200 lenses that were used on 35mm full frame film cameras. I beleive the DA designation means the lens is designed specifically for the smaller APS-C sensor, which means it won't cover the full fra...
Posted by Arthur Dent on 25/06/2006 - 16:16
135mm lens for sale needs minor repair
I hope iit's ok to post this here. Although the brand name of this lens is Yasashi, which I can't seem to find online, I've found it takes sharper photos than my pentax 135mm f2.5! I think this is one of those no name brand lenses that occasionally shine. The catch is that it's sluggish closing d...
Posted by davidxgreen on 06/06/2006 - 11:34
I want to go wide-angle again ?
Nice pics Niblue, make fisheyes tempting. Just in case you hadn't realised, you've got a blob of dirt on your sensor - just above the cows ear/to the side of the lady's head, in fact on all three pics once you know where to look! Time to read all those "cleaning your sensor" threads....
Posted by Daniel Bridge on 05/07/2006 - 14:57
I want to go wide-angle again ?
Nice pics Niblue, make fisheyes tempting. The Sigma isn't a fisheye - it's just very, very wide! Just in case you hadn't realised, you've got a blob of dirt on your sensor - just above the cows ear/to the side of the lady's head, in fact on all three pics once you know where to look! Cheers - had...
Posted by niblue on 05/07/2006 - 15:15
Arriving at 1:1 with 3X
The simple answer is this: to get 1:1 the image on the sensor/film has to be equal in size to the real life object you are photographing. The math in photographic terms is too hard for a person like me to explain, I'll leave that to others, but suffice it to say that 50mm + 3x ext is too general....
Posted by Don on 14/07/2006 - 12:50
Recommendations on lenses please
Hello Barry, What you may also like to look at are wider lenses such as the sigma 10-20mm f/4-5.6 EX DC HSM or Pentax smc DA 12-24mm for lanscapes and interiors, as with the cropping effect of the aps-c sensor you lose field of view when using lenses designed for 35mm film.
Posted by Ammonyte on 17/09/2006 - 20:16
New Pentax Lenses announced today 21 Sept 06
I want I want I want :D I'll hold off the 16-45 and see what the 16-50 is like. Only disappointment is that they are DA and not D-FA... does that mean Pentax will definitely stay with the small sensor???
Posted by Pwynnej on 21/09/2006 - 10:27
New Pentax Lenses announced today 21 Sept 06
I'm getting dizzy with all the new bodies and lenses being announced at the moment, the K10D the samsung clone, the 645 digital (with upgradeable sensor - see I was right it is possible!) and this whole raft of lenses. The excitement is so intense I need to go and sleep in a field in the Lake D...
Posted by Ammonyte on 21/09/2006 - 20:32
Hard to find - second hand Pentax A 400mm f5.6
Hi Dexter, re the focussing; if you use, say an f4 lens on it's own, you will get x amount of light reaching the sensor, and therefore the viewfinder regardless of the aperture at which you wish to take the picture at eventually. This is because the aperture won't change (ie the blades don't clo...
Posted by LiamD on 13/10/2006 - 07:38
Hard to find - second hand Pentax A 400mm f5.6
sorry Liam - should have scrolled up to check the name - was just reading the posts not the authors... I understand that in principle a prime lens should produce better images than a zoom. However I think that is a broad generalisation as well as an over-simplification.... A zoom lens allow...
Posted by dexteruk on 14/10/2006 - 00:44
Various suggestion
The 18-55mm that is packaged with the body is very low cost and worth having. Don't forget that the small sensor means a 1.5x magnification to the focal length. A 50mm lens acts like a 75mm would on a 35mm body. The 16-45mm is much better quality and thoroughly recommended. The 12-24mm extends we...
Posted by johnriley on 12/10/2006 - 17:43
Various suggestion
The 18-55mm that is packaged with the body is very low cost and worth having. Don't forget that the small sensor means a 1.5x magnification to the focal length. Well, honestly I don't find the packaged lens very useful for me as I already have a 24mm a 50mm and a 24-70mm. I would personally look for...
Posted by wbyeats on 13/10/2006 - 08:29
