Search results for 'sensor cleaning' - page 100
DA* 16-50 - cold feet
The zimbio test chart has too much "crap" on it. You can't know where the sensor is focusing if it is not lined up properly with the viewfinder indicator, so you can't adjust the focus properly. If you are so inclined, you could look at "Yvon Bourque blog" for very well made charts for focus adjus...
Posted by Daniel Bridge on 05/12/2008 - 11:14
Which lenses for new K20d owner.
Having had various lenses over the past year since going Pentax, I would definately stick to Pentax glass. Not just for the quality but also for the matching ergonomics of matching lenses. My choice would definately be DA* 16-50mm DA* 50-135mm Thats the 16-135mm range sorted, I was des...
Posted by cabstar on 05/12/2008 - 16:19
Which lenses for new K20d owner.
Without wishing to tell everyone how to suck eggs, the "Glass" as you refer to it, is the most important part of your photography. It places your image onto the film/sensor and the optics need to be the best you can afford. In your options you have made some excellent choices, do not spoil the opt...
Posted by Rees on 15/12/2008 - 11:34
Gutted
By total coincidence a friend was the highest bidder only a week ago for the same lens with a Cannon fit, only he paid a fair bit more. I was most chuffed to let him know that once again Pentax rules! :shock::shock: Those guys at Sigma really think of everything don't they? What sensor and mou...
Posted by Pwynnej on 10/12/2008 - 09:23
The difference between 10, 12 and 16?
A RAW file is an unprocessed file, bits 'n bytes straight from the sensor. To apply any kind of processing to it would invalidate it's RAW state.
Posted by Mannesty on 21/05/2009 - 17:10
The difference between 10, 12 and 16?
A RAW file is an unprocessed file, bits 'n bytes straight from the sensor. To apply any kind of processing to it would invalidate it's RAW state. Yes unless the correction are written in a code and leave the original information intact. I really don't see a problem with a line written with the amoun...
Posted by Anvh on 21/05/2009 - 17:26
Macro Advice from the experts please!
Lilly, the Macro will also focus so much closer. The 135mm prime doesn't even approach the close focusing ability of a macro lens. Close focusing is one thing, but the term "Macro" actually means that an object say 1cm long is reproduced on the film/sensor as 1cm long. This is 1:1 magnification -...
Posted by johnriley on 11/12/2008 - 10:49
18-55 II or 16-45?
You won't see a difference between the two 18-55 lenses, I know, I have one of each which I've tried on my K110d ( same sensor as your K100) If you want a better lens then follow the advice here and try the 16-45. The price is definately OK.
Posted by Hardgravity on 11/12/2008 - 17:08
18-55 II or 16-45?
You won't see a difference between the two 18-55 lenses. I saw a difference between the two I had with my K10D: greater edge sharpness with the II. More difficult was to see any difference between the 18-55 II and my 16-45. So I replaced the 16-45 with a Tamron 17-50 f2.8 to get something substan...
Posted by Hardgravity on 11/12/2008 - 19:44
Front Focus Issue - Help Needed
Hello Everybody! I was trying to establish what is the focusing situation of my gear; I prepared the whole focussing chart and started testing the various lenses and 2 K10 bodies. Whilst almost all the lenses are doing well, and have an average Front Focus of 2mm +/-, I have a big issue with ...
Posted by nathanever82 on 12/12/2008 - 13:46
Front Focus Issue - Help Needed
It's interesting that it's only become an issue relatively recently. How come we never noticed this with our film cameras? I wonder if it's something to do with the more critical depth of focus issues with the smaller APS-C format. The smaller the format the less error in the positioning of the ...
Posted by johnriley on 12/12/2008 - 23:00
Front Focus Issue - Help Needed
Ok now we're talking - I will try to focus to infinity - I have never noticed issues, but I will check tomorrow morning. - I have not tried MF - mainly because my eyesight is not that good and I wouldn't rely on it for fine adjustment - but what I have done is focus one body with the normal ...
Posted by nathanever82 on 12/12/2008 - 23:03
Front Focus Issue - Help Needed
I appreciate the fact that focus adjustment only fixes AF - but, is it possible as it seems, that the lens is focused correctly in MF and still shows front focus issues? would this be an issue of the focussing screen, and once this flips to capture the image the distance between sensor and lens is...
Posted by Mannesty on 12/12/2008 - 23:10
new lens
The macro setting is 1:2 but this relates to FF camera - with the cropping in an APS Pentax digital camera this equates to 1:1.3 and is adequate for many macro subjects. John I'm afraid that is not quite correct. A 1:2 macro means the 20 mm object will project as 10 mm on your sensor/film frame, ir...
Posted by terje-l on 06/01/2009 - 16:24
new lens
aminstar, how zoomed in for display is that shot? hmmm Amin wrote the info where you found the shutter time, you must have readed over it :) it's 97.5mm I do think it's a crop though because when I sharpend the photo a bit it looks good so it's the sensor and the lens that makes it a bit soft, I ...
Posted by Anvh on 07/01/2009 - 16:09
Cheap Lens for portrair photography
Hi all, I know this question has been asked many many times, and ive read a lot of reviews on this forum over many days to try and make a decision, but I think I need a little help from some of you more experienced users. I have a Pentax K20D with 16-50mm lens, I use this lens for club phot...
Posted by TerminalFunk on 06/01/2009 - 09:25
Cheap Lens for portrair photography
DA 70 - this will give you the same angle of view as a 105 mm lens on a film camera....ideal for portraiture..... It's also a nice size for taking out to do some detail shots when you are out and about.... On Pentax digital the 'crop factor' is approx 1.5, due to the fact the sensor is a fract...
Posted by Pwynnej on 06/01/2009 - 09:34
The Three Great Lens Mysteries
Mystery 1: How can different lenses have different FF/BF characteristics on one body? Mystery 2: Why is it not possible to use non-centre AF points with a manual lens? Mystery 3: Why is it not possible to use multi-zone metering with a manual lens? Regarding M1: My understanding of AF i...
Posted by Class_A on 08/01/2009 - 08:59
The Three Great Lens Mysteries
You can't use auto focus with a manual focus lens. Of course not. I was indeed referring to "focus confirmation". The red indicators are not as unrelated to focus confirmation as you describe them. When manually focusing, they pop up exactly when the AF sensor determines something to be in focus. ...
Posted by Class_A on 08/01/2009 - 10:46
The Three Great Lens Mysteries
You can't use auto focus with a manual focus lens. Of course not. I was indeed referring to "focus confirmation". The red indicators are not as unrelated to focus confirmation as you describe them. When manually focusing, they pop up exactly when the AF sensor determines something to be in focus. ...
Posted by El Dingo on 12/01/2011 - 13:28
