When the Hubble “stared at nothing
for 100 hrs” in 1995 it’s WFPC2 camera used 4
different filters. 30.3 hrs of the HDF image was
made using the “Red”(606 nm peak) filter at f 12.9.
I wanted to see what can be done today with a small
refractor using the QHY16200 CCD with
f5.5 and 41 hrs integration time using a red
filter. See that tiny red HDF field annotation
in the middle?
The 800% “Blow up” inverse image at top center shows
all the detail that can be extracted and
I can find about 30 galaxies versus the 3000
in the Hubble image.
As reference 2 of the brightest Galaxies are marked
in both images. But the Knight Observatory Deep
image shows many Galaxy clusters, the largest
at the Middle right of the image. Only 3 Galaxies in
that cluster have a PGC
number and the "brightest" 2 are at 2.2 and 4.9
Billion Lightyears distance.
(The faintest galaxy in this image that i can
identify is PGC30844770 at 8.4 Billion Lightyears)