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Douglas Rollain

Lion Nebula SH2-132 - RC71

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Posts Made By: John Krawczyk

October 2, 2004 04:29 PM Forum: CCD Imaging and Processing/Solar System

IR filter for planetary astrophotography

Posted By John Krawczyk
Yes, It helps the colors come out right. But if your using a Logitech QC4000 webcam, you dont need the filter. The built in IR filter is still in there even after removing the lens. Unlike the ToUcam which has its IR filter built into the lens which is removed to be replaced by the adapter.


October 5, 2004 07:06 PM Forum: Film Astrophotography - Imaging and Processing

Filters at prime focus ?

Posted By John Krawczyk
Most T-adaptors are theaded at the barrel end to take them. I use a 2" Antares and a 2" AP T-adapter and both are theaded for 2" filters. My 1 1/4 meade t-adapter is also threaded for 1 1/4" filters too.

October 28, 2004 03:06 PM Forum: CCD Imaging and Processing/Solar System

Eclipse from Annapolis, Maryland

Posted By John Krawczyk
This is about 11:45 when it started to come out of totality.

November 18, 2004 04:40 AM Forum: CCD Imaging and Processing/Solar System

Auriga Messier Clusters M36,37 & 38

Posted By John Krawczyk
m37

November 18, 2004 04:41 AM Forum: CCD Imaging and Processing/Solar System

Auriga Messier Clusters M36,37 & 38

Posted By John Krawczyk
m38

December 1, 2004 12:32 AM Forum: CCD Imaging and Processing/Solar System

DSI FIRST LIGHT, BLUE SNOWBALL...

Posted By John Krawczyk
Hi Ivan

Thats very good. I've been reading alot about them, but not seeing to many images. Yours may be the best i've seen so far with the Meade DSI. Please post more.

December 3, 2004 02:28 PM Forum: CCD Imaging and Processing/Solar System

DSLR vs CCD

Posted By John Krawczyk
With a DSLR its hard to beat the FOV for the price. 3000x2000 pixels is for a grand is a bargain in this hobby. You may not regret the switch, but you wont be able to do certain things like Ha or monochrome. Also extended objects like emmission nebula are very difficult to get with a stock DSLR because the camara makers put an IR blocking filter, optimised for daylight photography, that does not do well on Ha emmision lines. Lets just say, they didnt have us in mind in the design stage. If you could do it, i'd try to keep them both. I use a Nikon D70 and have on order an SBIG ST-402ME. I dont wish to hack my D70 and i would like to shoot other things besides clusters. If you do get the DSLR, i hear and read that the Canon 20D is very good for AP.

John Krawczyk

December 15, 2004 04:38 AM Forum: CCD Imaging and Processing/Solar System

need DSLR settings advice

Posted By John Krawczyk
what kind of scope?

December 19, 2004 06:39 AM Forum: CCD Imaging and Processing/Solar System

Fun target M42 for my Drebel

Posted By John Krawczyk
Hi Tom,

It looks real nice. Try some shorter exposures that will not overexpose the trapizium stars and then layer mask them over the longer exposure in photoshop.

Congrats on getting your ST-4 to work for you. I took me awhile too with mine. I dont think anyone who has ever owned one 'got it' right off the bat.

John Krawczyk

December 21, 2004 08:30 PM Forum: CCD Imaging and Processing/Solar System

DSLR as an Autoguider

Posted By John Krawczyk
No

A true DSLR has a mirror which makes it all but impossible to take video. Which leads to the obvious problem of mirror shake even if you could figure it out.

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