I have changed telescopes more often than my wardrobe. My primary interest has always been imaging and I have used a variety of instruments, each with their own strengths and limitations. I have owned the following instruments over the past decade:
Celestron: C8 and C11
Meade: SN-8 and SN-10
Takahashi: FS-60, FS-102, FS-128, Mewlon 210, Mewlon 250
Vixen: R200SS, NA140SS
My current optical tubes are an Astro-Tech 8 in. Ritchey-Chrétien, Orion 120ED and Pentax 75 EDHF. The Astro-Tech 8in. R-C is nice for some of the smaller deep-sky objects. Seeing conditions in my valley don't allow for much more the 1625mm FL that this scope provides. The 120ED (900mm FL) is a nice sized, well-corrected scope for mid-sized objects. I exchanged the stock focuser with a Moonlite one.
My mount is an older Losmandy G11 that was reworked and fitted with Gemini. My guidescope is a 500mm iOptron refractor on which I placed to focuser that originally came with the 120ED. I guide with an Orion StarShoot Autoguider (SSAG).
My traveling mount is an Orion Sirius EQ-G. I utilize an improvised side-by-side mounting plate that can accomodate the SSAG on a 200 mm Takumar lens plus the Pentax scope (or a variety of telephoto lenses). This unit is comprised of a Losmandy universal dovetail plate and two dovetail plate adapters. Flexure is not a problem with this setup.
I use a variety of 35mm lenses for imaging:
Nikon 180/2.8 (pictured below), 300/4 ED
Takumar 24/3.5, 28/3.5, 35/3.5, 55/1.8, 135/3.5 and 200/4
My digital SLR is a Canon 1000D (Digital Rebel XS) camera that was modified by Hutech. When shooting with this camera, I use live view to focus my image and ImagesPlus to calibrate, align and combine images.
Post processing of all images is done in Photoshop CS2. There I perform basic operations such as cropping, making adjustments in Curves and Levels. I have been using RegiStar to digitally stack multiple exposures of the same subject.