Search results for 'sensor cleaning' - page 671
Pentax 645D Release Date
I still can't understand why I would want to use my old FF lenses on a FF pentax, they just wouldn't cut the mustard. The edge deffinition would not be good enough for the demands of a FF sensor. I get much better quality using them on APS-C where the sweet spot covers more of the field of view. I...
Posted by K10D on 22/09/2009 - 10:59
Pentax 645D Release Date
The problem lies in the angle the light from film lenses strikes the sensor at.
Posted by gartmore on 22/09/2009 - 12:23
Pentax 645D Release Date
The problem lies in the angle the light from film lenses strikes the sensor at. Are you meaning cropped or FF sensor. If FF, then I'm confused. Regards :)
Posted by K10D on 22/09/2009 - 12:28
Pentax 645D Release Date
Any sensor. Film lenses allow light to exit at an angle towards the edges. This strikes film just fine, but pixels are in small pits on the sensor and the light scatters on the edge of the pits instead of hitting the pixel straight on. A digitally designed lens has a telecentric design that makes...
Posted by johnriley on 22/09/2009 - 12:34
Pentax 645D Release Date
The problem lies in the angle the light from film lenses strikes the sensor at. Are you meaning cropped or FF sensor. If FF, then I'm confused. Regards :) I mean FF. Sensors require the light to strike at right angles and DA lenses are designed to do that. The light from old film lenses stikes...
Posted by gartmore on 22/09/2009 - 12:36
Pentax 645D Release Date
Agree with John & Ken's comments. These issues have plagued 5D users already ;) One design (think it was Leica) correct it by adjusting the microlens array that sits on top of the CCD. The microlenses on the edges are slightly offset to compensate for the angle of incidence. Even the K20D repor...
Posted by MattMatic on 22/09/2009 - 12:47
Pentax 645D Release Date
So I have to assume that the Sony FF that Nikon use in the D700 has been "tweaked" to suit 35mm lenses as the images from my 12-24 on the D700 are razor sharp, edge to edge. Nope, the other way around. The Nikon 12-24 is a full frame lens but one designed in the digital era - hence it transmits l...
Posted by hefty1 on 22/09/2009 - 14:08
Pentax 645D Release Date
So I have to assume that the Sony FF that Nikon use in the D700 has been "tweaked" to suit 35mm lenses as the images from my 12-24 on the D700 are razor sharp, edge to edge. Nope, the other way around. The Nikon 12-24 is a full frame lens but one designed in the digital era - hence it transmits l...
Posted by K10D on 22/09/2009 - 15:22
Pentax 645D Release Date
[quote:3496ace15f="K10D"]So I have to assume that the Sony FF that Nikon use in the D700 has been "tweaked" to suit 35mm lenses as the images from my 12-24 on the D700 are razor sharp, edge to edge. Nope, the other way around. The Nikon 12-24 is a full frame lens but one designed in the digital e...
Posted by hefty1 on 22/09/2009 - 17:13
Pentax 645D Release Date
Don't forget they got the MZ-D as far as prototype stage before canning it. Whats the betting they discovered it didn't perform well with FA glass and that was part of the reason it never made it to production. If it had just been poor availability of the sensor (which I believe was a problem), they...
Posted by Mongoose on 22/09/2009 - 17:31
What does 100% crop mean
I understand what you are telling me but I still feel that the wording 100% Crop is ambiguous I do agree that it's a confusing term! 'Crop' isn't the part that's ambiguous - it just means that you've chosen some part of the original image, chopped that out and saved it as an image in its own righ...
Posted by ChrisA on 22/09/2009 - 07:36
Nothing suitable from Pentax, so I've gone Nikon
Already busy with #1200? :D 1700 and going strong. I don't even hear the racket the scanner makes now, it's such a part of my working environment. Another thing I've noticed is the permanent crick in my neck I seem to have, looking at all the portrait shots displayed in landscape in Picasa. No ...
Posted by ChrisA on 08/10/2009 - 17:01
Whether to go ahead
Why change? I just get frustrated when your mates and others look at your storted, like you are dimented or something when they find out you shoot with a pentax. It makes you think why???? I have to be honest, my photo's are just as good as there's, if even better. I just wanted to here it from the ...
Posted by Mike-P on 23/09/2009 - 18:31
Whether to go ahead
So please explain why Pentax doesn't 'come out with flying colours':? Couldn't be more straightforward. Pentax are as good as any other in terms of lens and body performance in their chosen market. However, they do not offer a professional service system, range of camera bodies, lenses or ancill...
Posted by lemmy on 23/09/2009 - 22:30
Another 645 Digital
They have had DMF cameras out together for a while (as have Leaf, Sinar, Rollei, H'Blad among others), but you should note that the price quoted is body only, excluding the sensor back. Pentax's 645D will probably be cheaper, when you consider that a camera back costs around £12000, that totals £160...
Posted by ikillrocknroll on 28/09/2009 - 19:03
Another 645 Digital
They have had DMF cameras out together for a while (as have Leaf, Sinar, Rollei, H'Blad among others), but you should note that the price quoted is body only, excluding the sensor back. Pentax's 645D will probably be cheaper, when you consider that a camera back costs around £12000, that totals £160...
Posted by PeteL on 28/09/2009 - 21:32
Another 645 Digital
The essential thing is that we know that medium format produces better quality than 35mm. When related to digital imaging the essential things will be the increased number of pixels and probably lower noise as the pixels themselves may be larger. When Pentax design the 645D and its lenses the...
Posted by johnriley on 29/09/2009 - 10:48
Do we rely too much on Technology
Sorry to rattle you Mike, but I feel that there are two camps regarding digital photos. The first is minimal cleaning and cropping, leaving the shot mostly untouched. The second camp seems to manipulate a shot endlessly until they get something they like, which could be nothing like the origin...
Posted by Hardgravity on 29/09/2009 - 13:25
Do we rely too much on Technology
Everybody should have to do 6 months on film before being let loose with a digital body. That way they'd learn about exposure, composition, shutter speed and how to use them all together. I am seriously considering this. For a digital photographer, I think this is actually really bad advice. ...
Posted by ChrisA on 29/09/2009 - 13:36
How to use the Colour Balance control on a DSLR
I suggest that different lenses have a different field of view so the base their analysis on a different set of samples of the scene. It could also have something to do with the different levels of UV getting onto the blue sensor?
Posted by sophiecentaur on 07/10/2009 - 11:05
