Cameras and Lenses

My daughter and I have become very interested in learning more about astronomy and astrophotography. So, I have become interested in prosumer cameras again. Here, I compile a list of Sony and Canon lenses of interest for our reference.

We will add thoughts on specific lenses we end up collecting.

Sony (alpha) a7R IV (Full-Frame Mirrorless)
Pixel Size: 3.73 microns
Notable: III + I = IV ¯\_(ツ)_/¯
Cost: $$$$

Canon EOS Ra
Pixel Size: 5.34 microns
Notable: “ISO invariance”
Cost: $$$

The Ra is the “astrophotography variant” of the EOS R. This is a full-frame mirrorless Canon camera using their RF lens mount. The Ra does not have the IR-cut filter over the sensor (sorta). It allows significantly more transmission of 656 nm light, which is a red associated with “Hydrogen alpha” or “h-alpha” that is emitted by many nebulae.

Sony E-Mount

Sony SEL1635GM FE 16-35mm F2.8 GM Wide-Angle Zoom Lens
Cost: $$$

Sony SEL2470GM FE 24-70 mm F2.8 GM Standard Zoom Lens
Cost: $$$

Sony SEL70300G FE 70-300mm F4.5-5.6 G Telephoto Zoom Lens
Cost: $$
Notes: This is not the GM version (note the F-stop)
GM =

Sony SEL35F18F FE 35mm F1.8
Cost: $$

Sony SEL24F14GM FE 24mm F1.4 GM
Cost: $$$


Canon RF


Canon RF 50mm f/1.2L USM
Cost = $$$$
Use = Star Landscapes; All arounder

Canon EF

Canon EF 200mm f/2.8L II USM
Cost = $$
Use = Deepsky; General Telephopto