Nikolas74

So i experimented by flipping the filter sides....

In the photo REFLECTION is the Oiii lets say A side

In the photo REFLECTION 2 is the Oiii lets say B side

What you think ????

Which photo has more info ?

Why the pattern/gradient changed ?

Which one is the correct side ?

Goodmorning , ok this is a stack of 6x1200sec Oiii filter( no claibration frames).........strange how the pattern/gradient changed....

Oiii filter is flipped side now.....

Light Pollution is more visible on the right....

What you make out of it ??????

That's what I am afraid of.....an element misplacement in the Redcat....but then again I don't see to have a star problem.....in the Ha filter this pattern don't show....tonight I will check with the filter flipped side.....

Just a follow up since my two posts seems to connect to each other....

Here you can see my post about FLATS Problem , maybe somehow its related to filter wrong side placement . the topic is here :

This is from yesterday , a stacking of 8x1200sec Oiii filter( no claibration frames).....I believe this a reflection of something but its round so it must be from the filter.....so tonight i will swap sides to see what happens...

Yes , my Flats are taken over to 3 seconds...the Ha was 3.70 if I remember....sorry but my English is not as good as yours and generally I hope i can make my questions clear as possible.....the shadow/light pattern between the Ha flat and Oiii flat is so different ....is it normal ?it's not concentric....another strange thing is that , this Ha master flat is doing a better job than the Oiii master flat when used accordingly to the light frames....

Is it normal that the shadows from the light path don't look round and instead they have this weird shape ? Shouldn't it be round ? I was thinking that maybe the flat panel was not centered because it's a bit bigger than the Redcat lens diameter....but I try to center it the best way I could.

Thank you...that's something I didn't knew.

I have read too about the Baader filters.....with the Astrodon's both sides look exactly the same , that's why i posted the question in case someone else experienced the same dilemma....

Anyway i will make my tests and see the result....

Thank you all 😀

Anyone knows which is the correct side to face the camera when using 36mm Astrodon filters ?

I don't see any indicators...

Olly thank you for your answer  , what i do is to load everything in APP and start the whole procedure from scratch , this is how i end up with the masters.....i use a different approach when doing it at Pixinsight.

So what i am posting as an example is the result from APP...but the same happens with other software.

Maybe its too much to use DARKS and DARK FLATS...i don't know i have lost it totally , my brain is spinning now 😀

10 hours ago, Laurin Dave said:

Did you sort this out?  Wonder if this was caused by internal reflections.. Had something similar and sorted it out with some flocking 

Really don't know.....I have to experiment more....what I know is that I never had these issues before.

10 hours ago, Adam J said:

Only just seen this. It's not the number of frames it's something wrong with the exposure and or your calibration process. 

I think too....till today I am still fighting to find what is going on....

I have uploaded 2 example photos of what I am trying to do in case that someone would like to answer..

Thank you !

Hello , 

I am going to use for the first time my color camera and i was wondering if i should check the debayer algorithm in apt tool to RGBG (my camera) or not ? what is the difference ?

Thank you.

I am sure that somewhere here has been discussed before but I would like to ask since I am going to try for the first time to combine 2 stacking results from 2 different cameras :

Which photo do you usually register to the other...the smaller fov into the wider or the opposite ?

Thank you.

Nikolas.

.....so to make my question more clearer i am attaching 2 photos (jpeg due to size limits) as an example of what i am trying to do with APP or PI....

I would like to place the smaller one to the wider one....or should i try to do the opposite ? is it possible ????

The wider photo comes from ATIK 383 and the narrower comes from SX TRIUS PRO 674C

Thanks again.

Nikolas.

The L-enhance looks very interesting filter comparing the price with the others on the market , maybe i would like to see a comparison along the Altair's Tri-band filter , because my main concern is that with the L-enhance i see the photos come out very reddish......or is it just a matter of processing ???

If these filters can capture Ha and Oiii what about bicolor coloration ? is it possible to do HOO ???

Adam thank you for your reply , 

Yes my Flats are corrected with Bias in the procedure of creating Master Flats (if that's what you mean) , also i have discovered now by experimenting that 16bit master calibration frames work better than 32bit , i don't know if that should be correct or not....

If they are over correcting , does that mean that i should use less calibration frames to create my Masters ? although someone told me the more the better......

Hello, 

i am having so many difficulties as far as i remember to make some nice flats to match my images.For some reason it it impossible for me to find the secret spot in time and adu for my Flats.

This is my equipment :

Telescope: Redcat 51

Camera: Atik 383l+ mono (i know the shutter problem that's why i always aim for 3sec and above for taking my flats)

Filter Wheel: Atik EFW2 (36mm)

Filters: Astrodon Ha & Oiii 36mm 3nm

FlatBox: Geoptic flat field generator 164mm (dimmable)

Image aquire software: APT Tool v3.71

Software: Astro Pixel Processor

This is what i get...i am uploading some images converted in jpeg for the site...

Photo A is a MASTER FLAT Ha (Bin 1x1) created with 30 Darks, 50 FLats (3.7sec adu 22000), 50 Dark Flats, 100 Bias 

Photo B is a MASTER FLAT Oiii (Bin 2x2) created with 30 Darks, 50 FLats (5sec adu 46000), 50 Dark FLats, 100 Bias

Photo C is an example result of stacking my fits of Helix Nebula at Bin 2x2 , with the above calibration master frames (this is the Oiii in this case)

Are my calibration frames Over correcting ? if yes what can i do ?

Is the Optical path problematic ? as i can see at photo A ? what can i do , what to check ?

I have checked also the filter wheel position related to filter change , but it comes centered...i couldn't see a fault on it.

i Believe i have a problem also finding the correct ADU value....i made any experiments by changing the adu value and i have tried at 22000, 32000, 47000 by using the CCD Flats Aid.......but nothing all come out the same.

I hope someone can help cause i am loosing my mind and my fits 😥

I have deselected Auto Meridian Flip from EQMOD settings , i have deselected LIMITS as well , but still i can not figure this out.......

What I am trying to do is when I issue a go-to command to a target that is on the other side of Meridian , I would like the mount to go directly and not make a circle around to reach the other side....

Is that possible ?

Thank you.

Do you think I can still use it for galaxies or star clusters ?

I don't believe that they can be so strong as eg. Astrodon 3nm 😀

I have been looking for the Altair Triband...

My purpose is to use the color camera mainly for getting RGB acctualy....

1 hour ago, Adam J said:

Under those sky's you will want a very narrow filter for nebula. Star clusters are bright and galaxy imaging will be a challenge irrespective. I would just go for a nebula filter as trying for best of all worlds will not work out well. Hence I would recommend a duel band filter, Tri band at a push. 

You mean a tri band would be more effective....?

1 hour ago, kirkster501 said:

I would investigate the IDAS LP filter.  This is very highly regarded.

https://www.firstlightoptics.com/light-pollution-reduction/idas-d1-light-pollution-suppression-filter.html

Say hi to the wonderful Greece to me.

Thank you  I have experience already for the IDAS LP2 but there are so many version I am confused now which one is better for color camera .....