sampling v speed

[iwols]

well after changing my planetary set up for a camera with better sampling rate(with big improvement)thought i would look at my dso setup.im using a ts optics 100mm with 414 ex and just wondered if i should be using a 2.5x powermate(which would make it slower)or even another camera,any thoughts guys

[RolandKol]

in short, - no you should not... better go opposite way and get reducer.
I am sure, guys can support it with maths, but I am not so bright...
So why no?

I testest in on similar set up, - what you will end up getting with x2 barlow, - VERY large/thick stars and kinda image which you will not want to show to anyone, even if the main target was quite small and fits into FOV.
In addition, - are you sure about your mount? as with x2.5 barlow, you will have to guide extremely well.. I greately doubt Skywatchers belew EQ8 are able to accomplish it.

On another hand, reducer will enable you to take looooong exposures 5-10min as guiding will not be an issue, plus most of the nebulas will nicely fit into your FOV.

Edited October 5, 2022 by RolandKol

[iwols]

thanks but wouldnt this make my sampling even worse?

 

[RolandKol]

Yep, completely forgot you are with CCd and large pixels.

Guys with CCD's do go for binning x2 quite usually.

It looks like it's your case

P.S.

Oops, sadly no... it will get even worse with binning... My apologies

Edited October 5, 2022 by RolandKol

[RolandKol]

6 minutes ago, RolandKol said:

Yep, completely forgot you are with CCd and large pixels.

Guys with CCD's do go for binning x2 quite usually.

It looks like it's your case

P.S.

Oops, sadly no... it will get even worse with binning... My apologies...
So try with no reducer first.