D_talley
Carpal Tunnel
Reged: 07/07/05
Posts: 1750
Loc: Richmond VA
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I took several images with my 4 inch refractor last weekend. This is of M51. 26 x 90 seconds with my unmodified Canon 10d. I should have use my CAT. Wow it is small. Next time I will use the big scope. 
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Dwight
Antares 105mm F/15
TEC 140 APO #74
Meade LX200 14 OTA
Meade LX200 12 OTA
Intes Mk-67
AT12IN
Orion 12.5 DOB
SBIG ST2000xm
Celestron C8+
Celestron 102AZ
Losmandy G11 Gemini
Losmandy G8 Gemini
Telescope Drive Master TDM
Canon 350D full spectrum mod,Canon T2i full spectrum mod
Hyperstar
QHY5 Guider, ST-4 Guider, STV Guider
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ClownFish
Post Laureate
Reged: 04/26/05
Posts: 6254
Loc: Baghdad, Iraq
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Don't need a bigger scope, just a longer one! 
CF
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Learn all about Polar Alignment and Manual Guiding on my website at www.PetesAstrophotography.com! Or visit my Foreign Service Blog!
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FLNightSky
professor emeritus
Reged: 03/13/06
Posts: 655
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Quote:
Don't need a bigger scope, just a longer one!
CF
CF
The longer FL would increase the magnification, correct? But wouldn't his 14" SCT provide better resolution of the object at the same mag than his 4" refractor?
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D_talley
Carpal Tunnel
Reged: 07/07/05
Posts: 1750
Loc: Richmond VA
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The good thing is my Big Scope (Meade 14) is the long one. Here is a photo of M65 and friends. Also taken with the 4 inch. 26 x 90 seconds.
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Dwight
Antares 105mm F/15
TEC 140 APO #74
Meade LX200 14 OTA
Meade LX200 12 OTA
Intes Mk-67
AT12IN
Orion 12.5 DOB
SBIG ST2000xm
Celestron C8+
Celestron 102AZ
Losmandy G11 Gemini
Losmandy G8 Gemini
Telescope Drive Master TDM
Canon 350D full spectrum mod,Canon T2i full spectrum mod
Hyperstar
QHY5 Guider, ST-4 Guider, STV Guider
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TheNebulai
Pooh-Bah
Reged: 01/26/07
Posts: 1144
Loc: New Jersey
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Nice images, yes a longer scope is what you need. The 4 inch can already pick up all of the light needed so no more inches are required, but a longer focal length would be nice.
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Equipment:
Z10, Meade 8" LX90GPS, Galileo 120mm
A bunch of EP's, Filters, and Barlows
10*50 Binocs
Sony Cybershot,Philips SPC900NC,DSI Pro,
DMK21AU04/ Astronomik LRGB
Messier Count: 48
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AviddayM
Carpal Tunnel
Reged: 12/28/05
Posts: 2099
Loc: Snohomish, Washington
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Nice image. Nothing wrong with wide field shots. They have their place. In this case it gives a good perspective of M51. There is still quite a bit of signal that you can pull out of this image without clipping it. I played with it and got quite a bit more actually. Did not post it though as some take offence to that.
Again, nice shot.
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Dave
FS102NSV f/8 - Sold
C11 XLT - Sold
NJP Temma II - Sold
STV Deluxe w/efinder
Ps 8:3-4
When I consider Your heavens, the work of Your fingers. The moon and the stars, which You have ordained. What is man that You are mindful of him. And the son of man that You visit him?
Edited by AviddayM (02/13/07 09:29 PM)
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s58y
Postmaster
Reged: 12/12/04
Posts: 6505
Loc: Eastern NY
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Nice shots, and they really do illustrate how small most galaxies are -- even M33 is too small for my current setup (FL=384mm).
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Hutech 500D/T1i, 550D/T2i, DMK21AU618, SBIG ST-402 autoguider
SV80S, TV102iis, EdgeHD 800
Lenses: 800mm, 180mm, 135mm, 105mm, 85mm
AP900, Barndoor tracker
http://www.flickr.com/photos/s58y/
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ChazK
Pooh-Bah
Reged: 11/23/05
Posts: 1453
Loc: Melbourne, Florida
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Has anyone been successful with EP projection of an object like M51? I'm sure focusing would give you fits but if you do not have a spare C12 hanging around......And that's a nice image wide field notwithstanding.
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Tak TOA 130mm/NJP Temma2
Tak FS 60CB
Canon 40D (unmodded)
Canon EF 28-135mm f/3.5-5.6
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Galaxy001
Carpal Tunnel
Reged: 06/08/06
Posts: 1633
Loc: San Ramon, California
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Both of the images are neat. Nice job!
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Zach
Remember to Keep Looking Up!
My observatory:
 Meade LX90 GPS 8" UHTC
With a (Meade) 18 mm UWA ep and a 3x telextender
Other cool stuff:
Meade ETX-60
DSI Pro
60 mm Solar Filter
Celestron dew shield
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D_talley
Carpal Tunnel
Reged: 07/07/05
Posts: 1750
Loc: Richmond VA
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Thanks for the feedback. Please work on the images and let us see. I am still trying to sort out Photoshop with all of its options. 
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Dwight
Antares 105mm F/15
TEC 140 APO #74
Meade LX200 14 OTA
Meade LX200 12 OTA
Intes Mk-67
AT12IN
Orion 12.5 DOB
SBIG ST2000xm
Celestron C8+
Celestron 102AZ
Losmandy G11 Gemini
Losmandy G8 Gemini
Telescope Drive Master TDM
Canon 350D full spectrum mod,Canon T2i full spectrum mod
Hyperstar
QHY5 Guider, ST-4 Guider, STV Guider
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AviddayM
Carpal Tunnel
Reged: 12/28/05
Posts: 2099
Loc: Snohomish, Washington
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Thanks Dwight, I haven't had any imaging time in to speak of for quite a while so I'm a little bored. Anyway, for your image I used curves and a little sharpening in PS CS2. There is some amp glow on the right of the image which isn't to bad so I left it alone. Be sure to check out the processing tips and tutorials for PS in the sticky threads on this forum. A lot of good stuff there.
Cheers
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Dave
FS102NSV f/8 - Sold
C11 XLT - Sold
NJP Temma II - Sold
STV Deluxe w/efinder
Ps 8:3-4
When I consider Your heavens, the work of Your fingers. The moon and the stars, which You have ordained. What is man that You are mindful of him. And the son of man that You visit him?
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Tonk
Postmaster
Reged: 08/19/04
Posts: 6100
Loc: Leeds, UK, 54N
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The problem with increasing the focal length for a fixed apperture is the required exposure time increases meaning you need good tracking
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Televue 85/TRF-2008 field flattener, Meade LX200 10", Manfrotto 055SSB tripod/410 geared head/AstroTrac TT320X-AG/056 3D head, GM-8/Gemini, 10 Micron 1000 HPS, Canon 40D (unmodded), Canon 450D (modded w/Astronomiks clip-ins - UV/IR, OWB), Coronado SM60/Lunt B1200/WO diagonal, Baader Herschel Wedge
Leeds Sky Clock Ripon Sky Clock
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kestrel0222
Carpal Tunnel
Reged: 05/21/06
Posts: 2339
Loc: Milford, Michigan
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Great shot!!!!!
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Tom
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polaris
super member
Reged: 05/02/05
Posts: 110
Loc: Kaunas, Lithuania
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This is really better than my shot of M51 from last weekend with a 300mm f/4.5 lens piggybacked. Light pollution was also a big problem, but it can be fighted to a degree at least. I was using ISO 1600 just because I already had darks for this ISO and corresponding temperature, and it was dam cold and I had to go to work next day, so I didn't switch to lower ISO. Heh, 120 seconds of exposure nearly completely washed out everything:
http://img251.imageshack.us/img251/9300/m51subwl7.jpg
But thanks to processing, I still retained some detail. Conclusion: even piggyback can reveal a few galaxies 
Edited by polaris (02/15/07 08:42 PM)
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D_talley
Carpal Tunnel
Reged: 07/07/05
Posts: 1750
Loc: Richmond VA
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Great shot. I should try that with my 300mm lens and a medium format camera.
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Dwight
Antares 105mm F/15
TEC 140 APO #74
Meade LX200 14 OTA
Meade LX200 12 OTA
Intes Mk-67
AT12IN
Orion 12.5 DOB
SBIG ST2000xm
Celestron C8+
Celestron 102AZ
Losmandy G11 Gemini
Losmandy G8 Gemini
Telescope Drive Master TDM
Canon 350D full spectrum mod,Canon T2i full spectrum mod
Hyperstar
QHY5 Guider, ST-4 Guider, STV Guider
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