astroturf Loc: vacaville ca.

no cropping no calibration frames shot in jpeg. canon t3i images stacked in nebulosity. distance-moon 240000 miles,rosette 1600 ly, Andromeda 2500000 ly

moon angular size .5 degrees as seen from earth


rosette av 2.8,iso 800,180x20 sec. lights, angular size 1.3 degrees


andromeda av 3.2,iso 400,100x20 sec lights,angular size 3.4 degrees

GTinSoCal Loc: Palmdale, CA

:thumbup: :thumbup: :thumbup:

beautiful images!

GT

JimH123 Loc: Morgan Hill, CA

I like using my camera lenses for astrophotography. This shows how you can get a much wider field of view. When I'm not using my 8" scope, I go to my 20mm f2.8, 50mm f1.2, 100mm f2.8 or my 300mm f2.8, mount it on the equatorial mount and get fabulous views also. And then I can decide upon the full frame or the APS-C sensor camera. Its very rewarding.

Good job! I lot of people forget how good camera lenses are for this.

And I almost forgot. Teleconverters work well for stars. Stars are point sources of light and do not experience the same light loss as when looking at more extended objects. Nebula or planets are more extended and would appear bigger but dimmer. Of course the quality of the image will depend upon th quality of the teleconverter and how well it matches the lens.

Marc G Loc: East Grinstead, West Sussex, England

Oh WOW, is all I can say
These are brilliant Astroturf :thumbup:

are these type of photographs achievable with a sigma macro 100mm
have sort my tracking for 180 lights :(

Oknoder Loc: Western North Dakota

Astroturf, I have to say I love your capture of the Rosette Nebula, I was going to ask if you had your camera modified to increase the reds/HA end of the spectrum but after seeing that the image is a compilation consisting of an hour worth of data, I would assume the camera is stock. I do have to say your images are stunning.



Marc G, your question was not posed to me, but I will offer my opinion. Most definately the 100mm Sigma is capable of capturing images of similar quality. Depending on your tenacity and having mother nature on your side these images can be had. The type of your existing equipment will determine the amount of ease this would be possible for you.

Astroturf has given excellent examples of what can be had with even short exposures of 20 seconds, by proper aligning and stacking of the images to pull the utmost amount of data from your images. Unsure if he used a motorized mount or not, but it really wasn't too long ago that all guiding was done by the observer manually adjusting a mount while constantly keeping a particular star centered, with small minute constant movements through the RA axis.

Personally I have never tried this type of guiding, but I have seen the photographic evidence that it in fact works.

Matthew

Albuqshutterbug Loc: Albuquerque NM

Excellent shots.
Now that I have a decent mount I need to go rosette hunting.

Bloke Loc: Waynesboro, Pennsylvania

Love the Andromeda shot! That's always been one of my favourite 'objects', but I have never had a chance to try and photograph it.

Marc G Loc: East Grinstead, West Sussex, England

Many thanks for you assistance Matthew, i have captured the Orion nebula using 300mm so Andromeda & Rosette maybe within my reach.
Totally agree, mother nature & urban lighting may hinder my efforts, but nothin ventured nothing gained :lol:

astroturf Loc: vacaville ca.

thank you GT appreciate it

astroturf Loc: vacaville ca.

thanks Jim much appreciated

astroturf Loc: vacaville ca.

Thank you Marc. the sigma will work fine. Matthew said it well.

astroturf Loc: vacaville ca.

Thank you Matthew camera is non mod. means having to collect more data.

astroturf Loc: vacaville ca.

Thank you Albuqshutterbug. You have the mount just need clear skies.

astroturf Loc: vacaville ca.

Thank you Bloke Andromeda my favorite also its easy to find

CraigFair Loc: Santa Maria, CA.

Great work as usual AstroTurf
It's nice to see raw photos, uncensored.
Craig