Search results for 'sensor cleaning' - page 103
Pentax 18 - 250 or Fuji S100FS
The DSLR will always be better because of its larger sensor and better lenses.
Posted by johnriley on 19/03/2009 - 15:41
Pentax 18 - 250 or Fuji S100FS
Whilst I like Fuji and had a S9500 a while back, I'm inclined to say stick with your DSLR. I doubt that the 18 - 250 is any worse than the fixed zoom lens on the Fuji. And just think of the superior performance with more specialised lenses you can buy, not to mention the sensor advantage with your K...
Posted by Greytop on 19/03/2009 - 17:23
Anyone using the old SMC-M 40mm f2.8 on a K20D?
I have a friend who has it and he says its fine (nothing special). The K20D's sensor will probably demand too much of it, so don't expect stellar results. It compactness is cool if you are thinking of saving space, but then you are thinking of a more casual use I suppose. Casual use indicates quick...
Posted by edumad on 20/03/2009 - 10:57
16 - 45 or LX3 ?
Both are also very differend cameras, your shooting style would be very different with the LX3 then with the K200D. They arent the same thing and can't be really compared in that matter. The sensor of the LX3 is smaller so you have more noise when shooting at high iso, with the K200D you can get ...
Posted by Anvh on 20/03/2009 - 18:20
16 - 45 or LX3 ?
I replaced the kit lens (mkII) on my K10d with the 16-45 and at first was dissapointed - the CA can be quite pronounced and the exposure was difficult to get right. But after getting used to it I never ceased to be amazed by how alive this lens is! The real-life experience is wonderful sharpness w...
Posted by TonyM on 20/03/2009 - 23:09
a setting on an A50mm f/1.7
Tigerita - give Harrow Technical a call - they give a guide price of £35.50 for repairs to small primes (and an indication of a discount for PU members :D). I've just sent 2 recent acquisitions with fungus to them for cleaning and have used them for repairs to an LX (major rebuild - new shutter b...
Posted by Steve Chasey on 25/03/2009 - 12:02
Which tc?
Just thought..... It can't be trying to focus because you will have switched the camera to manual so that won't be a problem. The lens cell will only move between two stops so nothing should get damaged and it can't fall out. You might struggle with the range of focus available. Push on the lens ...
Posted by shim on 01/04/2009 - 21:45
Which 500mm for wildlife?
Thanks for the input guys. I've looked at the 300mm (which would be 450mm equiv on the k20d unless my maths is off!) but I currently use a bridge camera with 500mm equivilent but find this a little to short to stay outside many species flight distance. But a 500mm would equal 750mm, which combin...
Posted by NeilP on 02/04/2009 - 22:38
Best Macro Lense ?
this is some advice I found whilst researching this topic. Hope it is useful. "A macro lens achieves a ration of 1:1, meaning the image on the film or sensor is the same size as the object being photographed. Another important distinction is that lenses designed for macro are usually at their...
Posted by jon.dc on 03/04/2009 - 08:55
Pentax DA 18-55mm mark 2 compatability
No because it's design for a smaller area (sensor) then 35mm film. It will work though but you will have massieve vignetting, not something you want :( Most of the longer DA lenses are usable for 35mm btw. They have tested some lenses on the USA forum, here have a look
Posted by Anvh on 11/04/2009 - 13:52
Some questions.... (16-50 vs. 16-45 vs. 17-70)
The Tamron 17-50 f/2.8 also looks as a very promising lens. If you look at the charts on photozone, the Tamron 17-50 looks sharper then the Pentax 16-50 and the 17-50 cost the same as the Pentax 16-45, so well worth the price I think. That depends on the camera. A 10mp sensor can handle 2000LPH, so...
Posted by Hythloday on 12/04/2009 - 19:32
Some questions.... (16-50 vs. 16-45 vs. 17-70)
The Tamron 17-50 f/2.8 also looks as a very promising lens. If you look at the charts on photozone, the Tamron 17-50 looks sharper then the Pentax 16-50 and the 17-50 cost the same as the Pentax 16-45, so well worth the price I think. That depends on the camera. A 10mp sensor can handle 2000LPH, so...
Posted by Anvh on 12/04/2009 - 20:34
Is it easy to check a new/used Lens?
Hi everyone. I'm going to receive my first DSLR + first lens! (I'm looking forward for that moment :lol:) As I read about lenses issues, is it easy for a newbie to check wether the lens is ok or not? What I found on the web is the following test, hoping I can do it properly, is it enough? ...
Posted by max11 on 13/04/2009 - 17:04
Kenko Teleplus DG 2X MC7 Teleconverter - Pentax AF
It's pretty obvious that a teleconvertor will ALWAYS degrade the image, but some will do so more than others. The degradation appears for two reasons. First, a teleconvertor works by cropping the picture (rather as happens when a lens designed for 35mm film is used with an APS-C sensor). It's...
Posted by George Lazarette on 14/04/2009 - 00:04
Opteka 500-1000mm High Definition Mirror Telephoto Lens
You control exposure by using ND filters behind the rear element, on the Tamron, they are 30.5mm. With a lens of this focal length you get very little DoF and you have to use a very sturdy tripod and, ideally, MLU. A lot of the bad press they get is due to people not using them correctly and a...
Posted by gartmore on 16/04/2009 - 09:35
UV filters
When placing glass on glass it should be quality, both B+W and Hoya produce quality filters. Using a lens hood to protect a lens can be quite detrimental, if the lens hood takes a knock it can severely damage the delicate screw thread on the lens itself - not a good idea. Hoya now manufacture a le...
Posted by Rees on 10/05/2009 - 18:30
UV filters
Using a lens hood to protect a lens can be quite detrimental, if the lens hood takes a knock it can severely damage the delicate screw thread on the lens itself - not a good idea. thank you for your point of view, it is right as well...but many different p.o.v.'s! I would personally purchas...
Posted by max11 on 14/05/2009 - 19:39
Interchangeable Lenses ?
Do keep in mind that the digital sensor is smaller so the angle of view changes. the 28-80mm would feel like a 42-120mm and the 70-300 a 105-450mm, the factor is 1.5x. The lenses stay the same though but they would "feel" longer because of the sensor, that's all.
Posted by Anvh on 19/04/2009 - 16:25
Value for the money
Don't know about the Sigma but the tamron 70/300's OK. I find mine gives better results wide open on the K110, the K200 suffers fringing. Apart from that a good VFM lens:D I thought the Tamron 70-300's suffered from purple fringing on all bodies. shim Yes but the sensor can also cause chrom...
Posted by Anvh on 19/04/2009 - 16:29
Value for the money
Fringing isn't a problem on the older 6 meg sensor, infact on the K110 I've had some realy good shots.:wink: But for some reason on the K200, wide open and full zoom presents fringing at the edges. Does this happen on the K10 and K-m which have, I understand, the same 10 meg sensor?:?:
Posted by Hardgravity on 19/04/2009 - 17:45
