Search results for 'sensor cleaning' - page 608
Dust
its strange as I have shots where dust is present but then on the next they are not, even when taking shots of sky etc and I haven't changed the lens. I've been out all day today and 90% of my shots are cream crackered :( so that we can have a look. As I say, sensor dust is a lot more obvious at...
Posted by ChrisA on 29/01/2012 - 18:31
Dust
The K-5 has a 'Dust Alert' setting (in screen 4 of the Set-up menu) Interestingly it has never worked for me. Dust bunnies all over photos, clearly on the sensor - I can see them with my sensor loupe - but Dust Alert doesn't :?.
Posted by Gwyn on 29/01/2012 - 21:57
Dust
Hi, The best way i think to clean the spots is wet cleaning with swab and fluid. It really works. Regards, Jeeess
Posted by jeeess1967 on 30/01/2012 - 12:57
Dust
I thought I had dust spots on my sensor, but on closer inspection of my lens (18-55 mk2) I notice a fair amount of dust on them and there's none on the Dust Alert screen. Looks like the dust is on the 2nd element from the back of the lens. Much the same problem as Gwyn describes above. What's the...
Posted by PeterMac on 30/01/2012 - 16:49
Dust
but on closer inspection of my lens (18-55 mk2) I notice a fair amount of dust on them This proves nothing. Dust on the lens does not appear as a speck on the image. and there's none on the Dust Alert screen. This also proves nothing. The dust alert is not guaranteed to show up sensor dust, as...
Posted by ChrisA on 30/01/2012 - 18:00
Photoshop help, please!
The *ist-DL has a CCD sensor. They get hot during long exposures! Additionally, I found that the quality of the battery made a big difference. Some of the batteries I used in my *ist-D were getting warm during long exposures, and the heat in the battery created more image noise ;) For asto work ...
Posted by MattMatic on 10/02/2012 - 10:38
Photoshop help, please!
It was processed from RAW. I had to up the exposure a little, but not overly. I hadn't thought of heat, although, that night, if the sensor was warm, then it was the only thing getting warm! :?
Posted by Father Ted on 10/02/2012 - 10:54
Photoshop help, please!
As I mentioned, the batteries getting warm are the number one thing to check. The CCD takes a heft of current to run, and doing this for a substantial time will create heat in the batteries. I'd suggest doing a test run indoors. When my (dud) batteries ran they were significantly warmer than body...
Posted by MattMatic on 10/02/2012 - 11:03
Photoshop help, please!
Sorry to sound at odds, but 30secs doesn't sound like long enough to cause heat problems to me. Admittedly I have a K10D, not a *1stDL, but this also has a CCD sensor and I've run exposures of some 10mins trying out welding glass (circa 10 stop) high density filters. I have had "smudging", if ...
Posted by Frogherder on 12/02/2012 - 17:08
Photoshop help, please!
I find very few of my images, when looked at closely enough, that wouldn't benefit from some degree of 'De-Noiseing', although it is never a uniform amount needed across the whole photo. For that reason the software used needs a fair amount of selective and fine control, so you can put the emphasis ...
Posted by McGregNi on 10/07/2012 - 23:01
Photoshop help, please!
Hello Ted I think David has hit the nail on the head, the banding is certainly sensor noise, while there are plug-ins that do help in post processing there is no substitute for getting a good RAW image at the time. Even with the latest DSLR sensors astroimagers are always battling with the old n...
Posted by mikeyscope on 11/07/2012 - 10:27
Help - Cleaning slides
Hello all I need some advice, I have a number of slides taken back in the 80s and 90s which I am trying to scan. Unfortunately the years have not been all that kind to them and most are dirty the rest are filthy. What should I use to clean them? Thanks in advance. Paul
Posted by Boyo2406 on 18/02/2012 - 23:07
Help - Cleaning slides
Very tepid, mild soapy water. Gently rub your finger across the transparency(or transparencies), and if you have one, a film squeegee that you would normally use in a darkroom. Sit them on a clean, flat non-porous surface such as a sheet of glass to allow the warmth of the room to evaporate any smal...
Posted by steven9761 on 18/02/2012 - 23:20
Help - Cleaning slides
You can buy slide cleaning liquids, or could. I would ask The Darkroom Ltd. for advice.
Posted by johnriley on 18/02/2012 - 23:25
Help - Cleaning slides
Most printers have film cleaner in their shop. See your local printer and ask if he can sell you some. His will be cheaper than the one you will buy in a store, since he likely buys a 4 liters/one gallon can at a price point way lower than the stores.
Posted by pentaxian450 on 19/02/2012 - 02:11
Help - Cleaning slides
All of the above is excellent advice. Then when clean store them in airtight containers along with packs of silica gel in a dry, even temperature. Ours are stored in their original boxes and then placed in airtight boxes which are kept in the dark room/ light room. No issues in over 40 years.
Posted by chunky on 19/02/2012 - 11:26
ME-F Electronic focus indicator problem
Yes, the exposure circuit is separate from the AF :D The exposure electronics is, IIRC, exactly the same as the ME-Super. Do watch out for the ISO/Ev dial - that was a common cause of exposure issue. Internally it's a ceramic variable resistor, and any dust or dirt would make it misread - drast...
Posted by MattMatic on 24/02/2012 - 08:56
using Da lenses with 2X `A` converter
As the manufacturers recommend minimum speeds for hand holding based on focal length x 1.5 I would do the sdame for entering focal length for the SR system. See how it works? No! That's not the same at all. The focal length you tell the camera for setting the SR is the actual focal length of t...
Posted by ChrisA on 10/03/2012 - 18:50
Sensor flare, tamron SP90
Please excuse the length of this post, but i am wondering if anyone is able to help. I have an adaptall SP90 2.5, a lens that I love using. Perhaps I am sad, but even looking through this lens gives me great pleasure, never mind the images it is capable of capturing. I purchased the lens predomi...
Posted by moose on 11/03/2012 - 13:12
Sensor flare, tamron SP90
I would imaging that reversing the Element would have a big impact on the optics. The convex shape is surely set in the correct place to bend the light to a given path, moving it would move the light path. Would it help using the Tamron extension tube (it has no glass) rather than a 2x converter?
Posted by bforbes on 11/03/2012 - 13:37
