Search results for 'sensor cleaning' - page 146
Your walk around lens?
If I am just going out and want to take something with me I tend to wander into the study, look at the selection of cameras and lenses, and grab what takes my fancy today. The FED2 with the Industar-26m maybe? My LX with the 50mm f/1.2 lens? The ES with the SMC Takumar 55mm? Or perhaps the SFXn wit...
Posted by womble on 07/03/2012 - 11:25
something wide and fast?
But the FA is full frame and the DA not.. surely the FOV is different between these two on the K7? unless im misunderstanding .. You are misunderstanding ;) Put you kit lens on 35 mm and take a photo. Next put the FA35 on and take the same photo. Compare the field of view; no difference. 35...
Posted by sterretje on 20/03/2012 - 10:51
something wide and fast?
A Full Frame image is 36mm x 24mm. With a 35mm lens this gives a horizontal field of view of approx 54 degrees. An APS-C image is 23.4mm x 15.6mm (K-5, other cameras may vary slightly) i.e. the sensor is only 2/3 the size of a full frame one. So now a 35mm lens gives a smaller horizontal field of...
Posted by JAK on 20/03/2012 - 13:01
DXO test some Pentax Lenses
DxO lens tests are known to be a bit strange and Gary likes to have a dig at Pentax every now and then :shock: I would just ignore them :wink: :mrgreen: As a user of the Pentax brand owning multiple bodies and a large range of Pentax lenses including two in the DXO test, I fail to see it as a di...
Posted by K10D on 21/03/2012 - 12:14
spec me a lens- aviation,zoo use
Hi Darkman, For aviation you definitely need a zoom (and unless you're getting really serious - step ladders and the like!) 300mm is as far as you practically want to go on an APS-C format. The wide end of the 150-500 is going to be too long for larger aircraft). Body wise I really like my K-5...
Posted by johnha on 23/03/2012 - 10:23
Advice re 35mm lens,please
I have the DA 35mm 2.4 & on the crop sensor makes a great portrait, walk around lens. I bought it with a view to upgrading to the 35mm limited if I thought I was using the 2.4 enough. Trouble is I use the 2.4 lots because its so good & see no reason to upgrade. I even like the plastic body, weigh...
Posted by cabstar on 27/03/2012 - 12:06
Quick macro lens query
On my Sigma the front element tube extends out as you move from infinity to closest and has a scale engraved on it from !:5 to 1:1 to give you a rough idea of object to image on sensor ratio. I haven't bags of money either so I went for the Sigma as the cheapest new (grey import though to save an...
Posted by wvbarnes on 28/03/2012 - 10:50
Sigma 150 500 Problem
Ok lots to consider there. Cleaning the contacts? Do you mean the battery springs etc Alan? We dont have Maplin over here mate but I will call into a DIY store and ask someone do they have something in that size. There IS a bit of play in the mount :( Thanks for alerting me to whats ...
Posted by QuestionableCarrot on 03/04/2012 - 15:57
SMC K (A) 24mm 2.8
Kris, was your shot taken on film? G Digital this time, my K20D. K. Well, it would seem that you aren't having any problems with it. It's a long time ago now, but the claim was that some lenses caused light to fall on the edges of the sensor at a sharp angle, causing a partial vignetting ...
Posted by George Lazarette on 09/04/2012 - 08:16
Which is better for street photography ?
A K-5 is pretty discreet size wise compared to most Canikon DSLRs. It is more on a par with quality 'compacts' that have an APS-C sensor and 35mm film cameras. But a spy camera it isn't! Put almost any zoom on it though and it does stick out (sort of literally) like a sore thumb while the 21 & 35's...
Posted by JAK on 11/04/2012 - 12:05
Which is better for street photography ?
A K-5 is pretty discreet size wise compared to most Canikon DSLRs. It is more on a par with quality 'compacts' that have an APS-C sensor and 35mm film cameras. But a spy camera it isn't! Put almost any zoom on it though and it does stick out (sort of literally) like a sore thumb while the 21 & 35's...
Posted by fritzthedog on 11/04/2012 - 14:10
Pentax/Ricoh putting prices up
CSC, yes, I certainly saw some noise about that, especially with others doing similar.. But Q, with those sensor specs at that pricepoint? There's always been a lot of 'small is nice, Pentax is good at it', but specifically this small with this tiny a sensor and that pricepoint?!? Must be before my ...
Posted by nass on 19/04/2012 - 16:59
Pentax/Ricoh putting prices up
CSC, yes, I certainly saw some noise about that, especially with others doing similar.. But Q, with those sensor specs at that pricepoint? There's always been a lot of 'small is nice, Pentax is good at it', but specifically this small with this tiny a sensor and that pricepoint?!? Must be before my ...
Posted by foneypony on 19/04/2012 - 17:30
Pentax/Ricoh putting prices up
Lets face it, it was made for the home market, where, it has done very well. K-01, mmmmmmmmm. Design piece!! Again, performs well. Well, without going off on a big old rant, it's that "home market" bit that concerns me. Pentax is a great brand when it does a 'photographer's product' ie 645D, K-X, K...
Posted by nass on 20/04/2012 - 14:45
true macro!
I've always understood that macro means that a subject (e.g. 1 cm fly) will be that same size (or bigger) on the sensor or film. So that would mean 1:1 I however have never seen an 'official' definition. One old book that I have states that one enters macro territory at 1:10; I would definitely n...
Posted by sterretje on 15/04/2012 - 08:02
The Sigma 150-500mm F5.6-6.3 APO DG OS HSM
Thinking of investing in one of these and wondered if anyone knows if it covers full frame or just cropped sensor.
Posted by doingthebobs on 16/04/2012 - 23:39
Sigma 105mm OR Tamron 90mm
You will get different results from a full frame compared to crop but that is purely down to sensor size. To say neither lens is suitable for Pentax digital is absolute rubbish though. Both are excellent lenses and either will no doubt get you very good results. The only let down imo is the outsi...
Posted by Mike-P on 21/04/2012 - 15:52
Sigma 105mm OR Tamron 90mm
I just phoned my local independant camera shop to enquire about the sigma and tamron lenses and the person there told me that these two macro lenses would not be suitable for a digital pentax camera when using for macro work. He said that they are full frame lenses and this would mean that I wouldn'...
Posted by helios on 22/04/2012 - 18:00
Recommended Service Centers for Fungus Cleaning
Any recommendations on where to get a lens that has some fungus checked, cleaned & repaired? Preferably in London. Been searching online, and these forums, but haven't had much luck on specifics. I've read up on Camera City in London although I doubt that they'll be the only ones doing so. I've a...
Posted by Opethian on 19/04/2012 - 21:32
Recommended Service Centers for Fungus Cleaning
I would contact Sigma direct: SIGMA IMAGING (UK) LTD. 13 Little Mundells, Welwyn Garden City, Herts. AL7 1EW TEL: 01707 329 999 FAX: 01707 327 822 EMAIL: [email protected] And see what they say. I would also make sure that you expose the inside of the lens to sunlight, this is k...
Posted by beakynet on 20/04/2012 - 09:59
