Search results for 'sensor cleaning' - page 667
Blue tint from a polarizer
Have you got the eyepice dioptre set accurately? Point the camera at a blank surface and as out of focus as you can make it, then adjust the dioptre until the viewfinder graticules are as sharp as possible. Sometimes using a tripod just isn't quite enough, if you are on a wooden floor or spongy g...
Posted by gartmore on 27/06/2009 - 13:49
Blue tint from a polarizer
Found this information on the pentax I am focusing on a persons eyes but am finding in the image their ears are the sharpest point in the picture. Is my lens faulty. This is a phenomenon with digital SLRs. If the image sensor is fractionally out of alignment, even by microns, the point of focus ...
Posted by Technoblurb on 28/06/2009 - 09:28
Blue tint from a polarizer
Thanks Stefan, my other lenses are ok. My only other assumption is that this lens was purchased before digital became mainstream and is just not focusing on the digital sensor properly
Posted by Technoblurb on 28/06/2009 - 10:25
Question
By all means you can suggest a refinement of the term, but how many people have seen your comments, and how many all over the world are using the term bokeh in the aesthetic sense? I'm pretty sure now that if I talk to a group of photographers about bokeh then they will be expecting me to be disc...
Posted by johnriley on 30/06/2009 - 10:50
Bag buying advice
When I outgrow my old bag, I decided that actual camera bags are heavily over priced for what they are. Looking around online I found and bought one of these http://cgi.ebay.co.uk/NEW-3-POCKET-TACKLE-GLUG-POT-BAG-FOR-CARP-FISHING_W0QQitemZ260439311549QQcmdZViewItemQQptZUK_SportingGoods_FishingAcc...
Posted by Road_Dancer on 04/07/2009 - 15:38
lenses designed for digital
Being a relative newcomer to photography, i still don't understand why a lens designed for a digital camera needs to be quoted as having a crop factor compared to 35mm. Surely if it designed for the digital sized sensor no other dimension need to be taken into consideration. confused am i
Posted by les on 14/07/2009 - 07:54
lenses designed for digital
People still buy pounds of potatoes and say the temperature is 65Farenheit. They (and I) will say "Jeez, that's thirty bob!" It's only a matter of familiarity. Where lenses are concerned, if a given lens can be fitted to a range of mounts with a range of sensor sizes (only two, at present, I ...
Posted by sophiecentaur on 14/07/2009 - 10:08
lenses designed for digital
The focal length of a lens does not change - a 50mm will be 50mm on an SLR and 50mm on a DSLR. What everyone became used to was that 50mm was a "standard" which approximated to a typical human field of view of around 45 degrees (without moving your eyeballs). And from that you could work out t...
Posted by polchraine on 14/07/2009 - 10:30
lenses designed for digital
Lenses are called "digital" for one of two reasons: 1. The image circle is smaller than that of a "full frame" lens to reduce size and weight. This will cause some vignetting when used on a film camera. 2. The coatings are designed with digital cameras in mind to minimise reflections from the ...
Posted by iceblinker on 14/07/2009 - 10:39
lenses designed for digital
It was the large number of different sensor sizes that probably created the "need" for the 35mm-equivalent idea. It's fine when the format is a standard one - we know a 110 camera needs a 24mm standard lens and that a 6x6cm one has a 75 or 80mm lens and when those were around camera users were part ...
Posted by johnriley on 14/07/2009 - 11:22
lenses designed for digital
You may be right Ben, in which case my FA lenses might find new found favour. Although I do rather like the Quick Shift facility on the DA lenses... John, I believe that most of the recently introduced lenses are FF. We know that Hoya hired consultants to develop a new strategy for Pentax, this woul...
Posted by Hardgravity on 14/07/2009 - 13:49
lenses designed for digital
Thanks for the link Stefan, quite a lot of information there, but having read quickly through the thread and followed several of the links it appears that the DA 55 and DA 60 - 250 give quite respectable performance on a 35mm film body. This gives some weight to my thought that sometime after th...
Posted by stevejcoe on 14/07/2009 - 22:18
lenses designed for digital
George the thread on Pentax forums states that both the DA 16-50 and 50-135 show vignetting, not too surprised by this as they are older reworked Tokina designs. Speculating further, it may be why the Tokina 11-16 has not made its way over to Pentax. Don't think we will see a FF though. With the up...
Posted by Anvh on 15/07/2009 - 00:25
What rot
Rubber won't last forever and mould gets everywhere in the end - the best you can ever hope to do is prolong the life of equipment! But you're quite safe in your assumption that you can freely mix your equipment - the unaffected won't go down the same road unless it's kept in similar conditions, ...
Posted by hefty1 on 22/07/2009 - 14:32
Nikon, Canon, Sony, Pentax, Leica, Panasonic…or?
Nikon, Canon, Sony, Pentax, Leica, Panasonic…or? Does the Gear You have Really Matter? Or How I learned to just take a “Pitcher…” Well, I will commence with a simple answer "NO"...Whether it is a Nikon, Sony, Pentax, Canon, Panasonic, Olympus, Samsung or any Medium format camera and digital ba...
Posted by benjikan on 24/07/2009 - 17:32
Checking sensor cleanliness
What is the best way to check my sensor for cleanliness, before taking my shots? Should I take photos of a blank sheet of paper etc? Do I focus on the paper, do I have aperture open or closed etc? Cheers!
Posted by Father Ted on 24/07/2009 - 21:07
Checking sensor cleanliness
I find the best is to go outside on a blue sky day and stop down to f22. Take a picture of the sky. The key is to stop right down.
Posted by pschlute on 24/07/2009 - 21:21
Checking sensor cleanliness
Don;t know about aperture but a blank canvas, such as a wall, helps. If the subject has any marks they may show up on the screen as dust, I know, I tried to remove the wallpaper pattern from MY sensor!:lol:
Posted by Hardgravity on 24/07/2009 - 21:49
Checking sensor cleanliness
I know, I tried to remove the wallpaper pattern from MY sensor!:lol: LOL!! That is funny :lol::lol::lol: Probably wasn't at the time though:wink:
Posted by Father Ted on 24/07/2009 - 22:04
Checking sensor cleanliness
I was so worried I had to go and have a Large G'n'T! It looked much better afterwards.:lol:
Posted by Hardgravity on 24/07/2009 - 22:31
