CANON EF 400 MM F/5.6
400 mm f/5.6L USM
7 elements in 6 group (one super UD-glass element, whose characteristics are similar to fluorite, and one UD-glass element)
Size and weight: 90.0 x 256.5mm, 1,250g
The Sun surface (June 17, 2004) - Canon EOS10D + Canon 400 mm f/5.6L + Canon extender 2x II
Filter: Astrosolar D=5 - One exposure 1/180 s - Reduced size by a factor 2.
Click here for another Sun observation with this telephoto (Venus transit 2004)
Messier 4 region (full field). Antares is the star at left. The globular cluster NGC 6144 is also visible. Canon EOS10D + Canon 400 mm at f/5.6. Stack of 6 x 3 minute exposures (suburban - naked eye limit magnitude: 3)
Detail around Messier 4 at the original scale (black & white view - add of the RGB channel).
V magnitude of some stars (see G. Alcaino & all ApJ Supp, 56, 19)
Crop of the Messier 20 field. Stack of only 4 x 3 minutes exposure. Post-processing 2x2 binning (BINXY command of Iris).