Howdy
Had a good nights imagine last night. I used a different technique, this time using rather long exposures, of up to 20 minutes each.
NGC4631, the little planetary in Corvus. 3x20 mins iso400 for an hours total, UHCS filter used. Ive not seen colours like that in it before.
IC5148, I was stoked to get this planetary this deep, with the strange pattern inside. 2x20 mins ISO 400, UHCS filter
PN G321.6+02 and he2-120 , G321.6+02 is the fainter one on the upper left and in the UKST Ha survey is described as a "Very bright axi-symetric PN". When using Star Atlas pro to locate it, I noted another PN could be fitted into the image, He2-120 and is much brighter, a pretty little red ring at upper right. I suspect these objects have been rarely imaged in colour before. Its 2x20 mins ISO 400 UHCS filtered.
NGC6818, a bright bluish PN, 2x5 mins ISO 200, UHCS also masked to enhance inner detail.
Finally this isnt the LMC through a 50mm lens, its Barnards Galaxy through the 10 inch scope, 2x15 mins ISO 200 only uv/ir filter used. Looks like a tiny copy of the LMC.
All images through 10 inch F5.6 scope, modded 350D camera, hand off axis guided.
Scott
Howdy
Had a good nights imagine last night. I used a different technique, this time using rather long exposures, of up to 20 minutes each.
NGC4631, the little planetary in Corvus. 3x20 mins iso400 for an hours total, UHCS filter used. Ive not seen colours like that in it before.
IC5148, I was stoked to get this planetary this deep, with the strange pattern inside. 2x20 mins ISO 400, UHCS filter
PN G321.6+02 and he2-120 , G321.6+02 is the fainter one on the upper left and in the UKST Ha survey is described as a "Very bright axi-symetric PN". When using Star Atlas pro to locate it, I noted another PN could be fitted into the image, He2-120 and is much brighter, a pretty little red ring at upper right. I suspect these objects have been rarely imaged in colour before. Its 2x20 mins ISO 400 UHCS filtered.
NGC6818, a bright bluish PN, 2x5 mins ISO 200, UHCS also masked to enhance inner detail.
Finally this isnt the LMC through a 50mm lens, its Barnards Galaxy through the 10 inch scope, 2x15 mins ISO 200 only uv/ir filter used. Looks like a tiny copy of the LMC.
All images through 10 inch F5.6 scope, modded 350D camera, hand off axis guided.
Scott
Thanks all
Heres a pic of my system http://www.users.on.net/~josiah/focuser/IMG_9932.jpg
needs coat of paint lol. The mount is a Astro Optical Supplies "Sampson" mount with shyncronous motor equipped RA drive, dec adjustment is manually done. The off axis guider is good as it allows exposures as long as I like with no fear of flexure based guide errors.
Scott
Hey, Where is the scope? I can see the focuser, man that is huge. Yep okay found the telescope. Its obviously a good performer. The Sampson is the same vintage as my Goliath. Great set-up Scott, and most importantly it works well.
Thanks all
Heres a pic of my system http://www.users.on.net/~josiah/focuser/IMG_9932.jpg
needs coat of paint lol. The mount is a Astro Optical Supplies "Sampson" mount with shyncronous motor equipped RA drive, dec adjustment is manually done. The off axis guider is good as it allows exposures as long as I like with no fear of flexure based guide errors.
Scott
Did you make that focuser (and off-axis port) yourself ? How does the off-axis eyepiece get line-of-sight to the primary via the secondary mirror, or is there another mirror involved?
Howdy
No I bought it off Aeroquest Machining http://www.aeroquest-machining.com/page9.html
It has 2 large prisims, one movable to allow good radial adjustment to locate guidestars easily. Loosening the 4 brass knobs allows the whole thing to rotate, its a very clever yet simple design.
http://www.users.on.net/~josiah/focuser/IMG_9935.jpg
This is a pic of the inside shortly after installing it on my scope. It required cutting an 8 inch hole in the tube. As the base is so large, it is ablolutely rock solid, you could almost swing off it and not see it flex
The focus for guidestars is a little too far in, but I use a 2.8x barlow anyway, for plenty of magnification, and the eyepiece is usually easy to get to for guiding.
Scott
