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Forum: General Talk
07-02-2008, 07:04 AM
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Forum: Photographic Technique
06-27-2008, 04:10 AM
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For the hyperion line of eyepieces yes. They are threaded so they can take an adapter. I don't know of any others that are though. Great overall eyepieces too.
Link: Digital Photography T-Rings and Adapters |
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Forum: Photographic Technique
06-25-2008, 06:47 PM
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Here you go, I'm not fond of using the 18-55mm, I only have the 52mm ring. I have the 49mm ring on order so I can use the 50mm f/1.4.
Eyepiece, lens and mounting ring:
The two mounted together:
Lens eyepiece assembly on the telescope:
Camera, lens, eyepiece, telescope:
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Forum: Photographic Technique
06-25-2008, 08:26 AM
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I've use intl express post many times, though it's normally inbound to the US and it works very well. I've had things ship from Hong Kong on Friday arrive Monday. Nice service and the prices seem very reasonable.
Though be careful, I do not believe all post offices on the US can send express post. Maybe it's just the small rural ones like mine or within the US, but I know talking to the postmaster he mentioned once that if I wanted express post I would need to drive to a city.
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Forum: Photographic Technique
06-23-2008, 12:11 PM
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Correct.
The telescope in this case preforms the exact function of a lens.
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Forum: Photographic Technique
06-21-2008, 04:44 PM
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I'm not sure why stopping down the lens is a good idea. The moon is at infinity, open it up to the lenses best aperture (on mine it's closer to f6-f8).
The magnification does help, but it's also the light gathering abilitf that a 10" scope brings. The full moon is so bright that it will almost blind you, and you'll have moon ghosting on your retina for an hour afterwards. It's a hell of a lot cheaper than a $6000 lens holly crap, seriously. If you want to do astrophotography you can almost buy a mount and scope for that
The setup is an Orion Skyquest xt10i. You can almost the same scope from a different vendor for $600, and $100 for the eyepiece and afocal mounting ring. This isn't a good general astrophotography rig though, it only works on really bright things like the moon and maybe saturn/jupiter.
The "right way" to do it though is prime focus. When I took the pictures the camera was mounted to an eyepiece with 8-12 elements in it, then through a lens with ~5-6 elements. That's a LOT of glass to go through. In prime focus you mount the camera without lens straight to the scope then use the telescope as a 1250mm lens. This way you have only defects in the mirror to worry about, and it projects a great image right onto the sensor. Sadly though it's setup for visual use, and I would need to shorten the optical path to achieve prime focus. That means a new focuser or moving the main mirror about 2". A pain just to take moon shots.
Beats the pants off of a $6000 lens, probably better pictures too.
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Forum: Photographic Technique
06-20-2008, 08:00 AM
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Photographing the moon isn't all about magnification. The light amount of light you can pull is in very important. I'm not sure trying to get 1/125 is really all that required at the magnification you guys are using. Photographing the moon at full moon also results in the least contrast and texture.
Here's a couple of scaled down shots from my old k100d with the 18-55mm at between 70x to 160x, click on the photo for the 100%. These haven't been retouched except for scalling them down:
]
The last lunar eclipse:
These were all shot through a 10" telescope using afocal projecting from the eyepiece into an DA 18-55mm+k100d. The biggest problem I have is getting the focus right because it's very very thin, and that's a lot of equipment hanging off the telescope. I hope liveview with 8x magnification on my new k20d will help. Too bad the sun sets and moon doesn't rise till 11:30pm at the moment.
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Forum: Pentax DSLR Discussion
06-14-2008, 06:42 AM
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Shit happens. I'm guessing a contact broke somewhere, assuming the IC is read vertically.
Why are the pictures ruined? While annoying, it's relatively easy to fix in any good image editor.
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Forum: Post Your Photos!
06-09-2008, 07:53 AM
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MRRiley,
I've driven into Skagway several times. The part you see when you get off the cruise ship is setup for tourists, which is half the reason the towns exist anyways.
Given the size of the most of the coastal towns, ~ 1000 people they aren't going to support any local good camera store like you're used to in the lower 48. There just isn't the population to support such a shop.
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Forum: Digital Processing, Software, and Printing
06-07-2008, 01:19 PM
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Wombat,
Ubunto 8.04 is fine, pulseaudio is a bit of a pita.
I'm very tempted to buy LightZone for linux. It works really nicely, but I just don't that much colour retouching, and what I do do, gimp works enough.
KPhotoAlbum I really like. I like how quickly you can tag files and the searches are really powerful. The point of a good photoalbum software is to find pictures quickly. You can tag pictures in digikam but it wasn't as powerful. That said I like a lot of the features of digikam like easy croping, etc. I wish kphotoalbum could inhale those.
Just because you're using gnome as your desktop doesn't mean you can't use kde apps. Use what's best. I use firefox which is a gtk+ app even though I use kde.
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Forum: Digital Processing, Software, and Printing
06-06-2008, 04:11 AM
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Both installed fine here. PPL his some corruption where it draws the picture.
Example:
asj@molly:~$ wine --version
wine-0.9.59
I've used ubuntu 7.10 and 8.04.
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