Optical test

NB : all optical test performed with no guiding .

Following you will find 3 screen shots ,  all are the same area of the sky on a highly zoomed area near M15 taken with good seeing  .
It shows what the astrograph is capable of achieving in terms of resolution in real life, the telescope had just been assembled the same evening  , so collimation could still be improved )
Randomly selected stars with low FWHM :

FWHM 1.206

FWHM 1.78

 

FWHM 1.098

Test performed with Maxim DL Pro 5 .

Playing with  short exposures  :

M31 exposure 100 s , unprocessed , uncropped,  stack of 10* 10 s exposure in Luminance filter Bin 1 on the 31 st of August 2013.

Seeing was medium, sky hazy and light polluted at sea level .

You can see how fast this instrument can be ! zoom on the image, you'll start to see the hydrogen clouds in the arms of M31 in 1min40s exp. ! 

Vega, 10 seconds, Bin 1 unprocessed ( except  turn into negative ! ) , uncropped, windy ( 10 to 15 Mph no dome ) , hazy , poor seeing condition .

M11 , 10 seconds same conditions .

Any internal reflection on bright star ? :

Here is the answer , Region surounding Altair, calibrated, DDP applied , uncropped 180 s at Bin 1 with Clear Filter from Baader , as you can see  bright stars are clear, symmetrical and void of abnormal reflection or secondary .

Spykes are also very clean .

Sky was a bit hasy and seiing poor to medium with some light pollution on September 1st 2013 .

Closer look at the central image of Altair in negative :