Search results for 'sensor cleaning' - page 82
None dirty word astro!
No idea how it does but it does it!! You tickled my curiosity so I had to find out. It's thermo-electric cooling (TLC). Put two different materials in contact, pass a direct current across the junction and one side heats up, the other cools down. Dispose of heat to atmosphere and you've got a solid-...
Posted by Lubbyman on 13/08/2024 - 19:27
None dirty word astro!
[quote:3496ace15f="Spad"] From what I can understand of the principle, it's temperature difference that counts so the temperature you dial in might be the difference with respect to ambient rather than the actual temperature of the sensor - perhaps worth checking. Steve That is correct... I...
Posted by Spad on 13/08/2024 - 23:40
Anyone used a Sigma FP or FP-L ?
While I haven't used any Sigma cameras, the L-mount is my main system these days so I have some familiarity with it. For something that's FF in as small a package possible there is also the new Lumix S9. Both cameras have some serious sacrifices to make them that small - no viewfinder, no mechanic...
Posted by LennyBloke on 22/08/2024 - 10:15
Need Help with Photographing Paintings – Colors Look Dull and Shadowy
Could you upload an example so we can see the actual problem with the settings used, this would help greatly with any suggestions made. Presuming the paintings are not behind glass.......... No, they are not glass. They are canvas paintings. Someone told me that, when photos are taken in bright s...
Posted by canvas-art on 15/01/2025 - 10:39
Need Help with Photographing Paintings – Colors Look Dull and Shadowy
Yes, please post a photo or two with your settings, it's very difficult to provide advice blind. And I agree with what Chrism8 and Jonathan-Mac say re manual exposure etc.. Find what works best for you and stick to it, don't let the camera choose. I once photographed a lot of watercolours for a ...
Posted by Lubbyman on 15/01/2025 - 13:17
Another version...
Stupendous! This is the same deep sky object that I shot with my K3 Link, please, so we can compare. Is it the cooling that makes the astro camera so special? Or something in the electronics? Or is it an iconograph imported from Ankh-Morpork? Steve It is in the ! To be honest.... its no...
Posted by Spad on 04/03/2025 - 14:17
Spam....
The modus operandi of 99% of spammer is to register, post something with a link in hope that it doesn't get cleaned up and never return. The VPN trap would only be on new registrations, I know a lot of people prefer to browse behind a VPN. It would just be used as a deterrent, extra hurdle for...
Posted by rick on 02/04/2025 - 18:16
A smaller camera system - your views please!
Personally, I would consider the S9 - panoramic aspect ratio option, usable file sizes (the Sigma is 61mp) and interchangeable lenses so the sensor can be cleaned (the Sony may suffer from dust intrusion over time).
Posted by smc on 28/05/2026 - 23:37
A smaller camera system - your views please!
My camera bag is very full. It holds my K-70, with four lenses - Pentax DA 35mm, Pentax-D FA Macro 100mm, Pentax-DA 12-24mm, and Pentax DA 18-270mm. It also holds a number of filters, an external flash, spare battery and charger, a lens cleaning kit, and a number of other items. I often leave the ba...
Posted by DaleHCook on 30/05/2026 - 03:23
A smaller camera system - your views please!
I was looking at a Ricoh GR4 but reading Lenny's thread here has put me off, well a bit. Fortunately I haven't suffered too much lugging the K1 about even with a couple of lenses, but I agree with others here that is to choose carefully what lens(s) to take, unless in the car of course. But yes as t...
Posted by loadoftripe on 30/05/2026 - 16:46
A smaller camera system - your views please!
My realisation came when I found I was leaving the Pentax bag in the car and taking an Olympus with a couple of lenses out instead, purely because it was so much more pleasant to walk with the lighter weight gear. Like Lennybloke though I wanted to stick with FF so I listed comparative bodies and th...
Posted by RobL on 03/06/2026 - 16:02
A smaller camera system - your views please!
You're both right Kevin and Chris - I have thought about medium format based on one of the biggest reasons I like the K1 so much, and that is I can crop significantly and still retain an image with good IQ! But Chris, a 15Kg plus bag of stuff :shock: I couldn't cope with anything like that now. ...
Posted by LennyBloke on 05/06/2026 - 18:18
A smaller camera system - your views please!
Currently looking around ourselves for what’s next. Looking at OM System and trialling the OM-5 mkii as a taster. Mix of basic lenses to get started - the 17mm prime is tiny and makes the whole thing really compact. Miss the image quality of the Pentax but need to do a fair comparison and ma...
Posted by richandfleur on 06/06/2026 - 13:48
Pentax 18-35mm FAJ
Thanks for replying. In terms of the proportion and distortion of the final image would there be any difference between the Pentax 18-35 FA-J supplied with the *ist D and the Pentax 17-28 fish eye lens I am thinking of buying? Whether it be 17mm or 18mm at the short end, the image on the senso...
Posted by Anonymous on 22/11/2003 - 07:43
Pentax 18-35mm FAJ
There will be an enormous difference - the 18-35 is intended as a standard lens for the digital sensor, giving an effect similar to a 28-80 on a standard film SLR. The 17-28 allows all the straight lines to bend outwards at the 17mm end (barrel distortion) to give a fisheye effect. This effect c...
Posted by johnriley on 22/11/2003 - 21:05
The Dreaded Fungus
Optical glass is quite soft and delicate, and the fungus can actually eat into it. Cleaning is expensive so it needs to be avoided wherever possible.
Posted by johnriley on 14/06/2004 - 19:47
The Dreaded Fungus
Hi Kim & the rest of the Pentax gang! First, thanks for the link Kim. It helped me to see the tools that is necessary for the lens repairs. I have made my own varianta of it. It looks like something unfinished but it is work well. I was manage to unscrew the ring which fix the front element t...
Posted by Saso E. on 22/06/2004 - 14:20
Filters and flare?
The main thing a filter prevents, which a hood can't, is cleaning marks. Cleaning dust or moisture off a 'sacrificial' filter means you don't need to be quite so careful, which is great if you need to have a quick wipe when out and about. I uncapped my DA15mm this afternoon, and found the front elem...
Posted by Pentaxophile on 29/06/2012 - 19:58
FA J lens opinions
In an earlier thread I asked about lens reviews and a number of people pointed me to some great sites. However these cover only older lenses and I am looking for reviews now of the FA J series of lenses. The smc FA J 18-35mm F4.5.6 AL has it's own thread below - and general opinion seems to be th...
Posted by Andrew Cunnington on 18/02/2004 - 10:25
Pentax faj compatability
I'd like to use FAJ75-300 as a budget zoom for my MZ-7. According to forums picture quality of this lens with *ist body is quite acceptable, but film frame of MZ is much bigger than *ist sensor. What about quality in the picture peripheral? Did anybody try this lens with film camera? Thanks in adv...
Posted by Anonymous on 20/04/2004 - 10:18
