3 replies to this topic

[starhunter50]

when i first got my Mak 150 from Ioptron i wanted to try reducing the focal lenght as a test for galaxies.

i tried a bunch or reducers Antares 0.63,  celestron 0.63 ,  Meade F3.3 ,  CCD67T 0.67 ,  Antares 0.5 2 inch ...

All of them caused huge flares on M57 , so thinking it was because i was to close to Vega, i moved way over to another targer and the same thing.

cloudynights members had a lot of ideas as to the cause , mostly it was the reducers fault. 

So instead of giving up , i made a baffle tube , painted it with moosoo  black  flat paint and also the inside of the minuscus and around the primary ring.

Any thing that was shiny got a coat.

well , that did the trick. huge difference. i could flock the entire inside of the OTA but, no need at this point.

 

here are without any painting including baffle and the one i spent the day painting. plus my new Mak baffle glare reducer.

 

 Before

 

 

 

After black paint application. Taken with the CCD67T @ 1399mm F9.33

 

 

Edited by starhunter50, 22 May 2025 - 12:57 PM.

[A. Viegas]

very cool.  just out of curiosity which of the reducers did you find worked the best, how was the celestron 0.63x?  I have one of those hanging around

[starhunter50]

i ran so many test i cant remember all the results, sorry.... the answer is CCD67T from Astrophysics.

im at 100mm spacing , but i want to take it to 120-25mm to see if i can finsd the 0.65 reduction.
 

[starhunter50]

i could run these tests again and take images of the same target, once i feel better.