uhb1966

Hi Smerral, again a super work!  Thinking about the same filter. But you have a Bortle 2 sky and i have Bortle 4, so not sure whether that filter would work well for me...

Anyway, love your work !! Best, U.

Hi Philipok, are you connecting phd2 via EQMOD? If yes, did you correct EQMod's guide speed from 0.2 to 0.9?  Best, U. (PS sorry for being Cpt Obvious)

Hi Paul, to be honest i didn't have much luck with these 2 brands. Honestly, i'd rather buy a pair of good binoculars than buying these. Sorry, probably not what you wanted to hear 😕

WOW. Just... wow. 

On 30/09/2019 at 16:19, tooth_dr said:

It attived today

 

i envy you a bit

Thanks Pete!!

I'm using the baader mpcc. Not bad. Works very well with Canon EOS. With my QHY8, i needed to get a bit creative. Can send pics if needed. Best, U.

19 hours ago, jimjam11 said:

You can also use nina (free) which has a built in optimal exposure calculator. 

I'll give NINA a try run. Thanks!

18 hours ago, Aramcheck said:

Have a look at this talk by Robin Glover from Sharpcap:- https://youtu.be/3RH93UvP358?t=81

Also:- http://dslr-astrophotography.com/iso-dslr-astrophotography/

Cheers
Ivor

Hey Ivor that's one heck of info.. best info so far on subs!!

4 minutes ago, Robindonne said:

Oke very helpfull thx.  So to make my setups complete and good...

my newtonian is now equipped with my oag and dslr.   Need to look for a better guide camera and a comacorrector to make te whole setup complete.  

i bought another sct-oag/360 rotator(secondhand but cheap and unused/sealed) for the occasional use of my c8. Bought is because it came for sale and the mentioned refocussing of the oag-guidecam when swapping an oag between scopes.  
This setup also gets the better guidecam to make it complete also.

whats left are two old ed refractors.  Kind of planned to use as guiders when not used as mainscopes, but the oag’s are the guiders from now on.  

So my final question ( for now😬) would be: how to guide the refractors?   Also the oag (what some mentioned an overkill) or for this maybe a small guidescope?
Both zenithstars and both need extenders to get in focus. I would prefer spending another 80,- on a thick oag then on a simple 2” extender.

my budget is not made of 6 figures but spending money on the right stuff (instead of the earlier mentioned “asi120-paper-weight) is always justified.   
 

-better guidecam like the asi290 mono?

-f4 aplanatic coma corrector

-small guidescope for the refractors or also oag?

its rainy and cloudy here in the best soccer/f1 country, so plenty of time to look for missing items. 

 

+1 for the coma corrector! IMHO absolutely needed for good pics. Tip: they dont put the infos on "distance of coma corrector to cam" for nothing, as i learned the hard way - even if you're like 3mm off, you see it in the pics :/  

The Dalek Obs??? Cool!

Impressive... *most* impressive (panting noise)

Hi huntapix, i have almost the same mount/Scope combo.

tip 1: make sure you use your handset is set to "PC direct" mode

tip 2: in EQMod, make sure you click on the search button (binos) in adfvanced. EQMod *MUST* show "found".

If needed, i can send pics.

Clear skies, U.

4 hours ago, wimvb said:

Phd has an accuracy measured in the tenths of a pixel. But how accurate can the mount move? Besides that, even with longer exposures, it's often the seeing that limits guiding. A larger aperture guide scope will gather more light and give you better/more stars to guide on. With my oag, I can always find a star, but very often that star is so dim, I seem to be guiding on noise. That's with an ASI120MM-S. Hopefully, my newly ordered ASI290 will be more sensitive. I have had good results with a skywatcher ST80 scope and asi120 camera, fixed to a top dovetail on my scope. Now with a longer focal kength reflector, I'm more concerned about mirror movement (flexure), hence the oag. 

I share Wim's view, it's usually seeing that limits guiding (and imaging ). FWIW i have calculated my ratio and it's 1:3 - and i do believe i'm limited by seeing, my mount's precision and, last but not least, my skillset 😬

You're absolutely right

Hi Robin,

I'm no pro but i can tell you the following: i am using an 9x50 guidescope with an orion SSAG and i have never had any problem in finding a suitable guide star for PHD2. I do believe that that both the 9x50 and the 71mm should be absolutely fine - no need to splash out extra money IMHO. One small disadvantage in not using an OAG is that if your guide star is too far away form the point your primary is pointing at, and your imaging close to the pole, there might be considerable field rotation. So make sure your finderscope points more or less at the same point as your primary

It's June and no challenge in sight ?!😭

Hello Bob and Craney,

is there any way to show us a with/without picture regarding these filters? Asking for a friend    

Hey Smerral,Thx for sharing!!

Hi Calzune, what is your experience with that filter? Best, U.

Hi Astro!

- Yes, the narrower the band, the longer the exposure as you are getting fewer photons per time unit.

- Re light pollution vs. narrow band: well, they' re different - i suggest you hunt the pictures posted here, it's also a matter of taste.

Best, U.

Hi Ivo, thx for your test! 

The performance of that filter doesn't look too bad.

BTW good work on APT 3.84, i like it!

Best, U. 

Difficult to improve on Thalestris' answer. I'm carrying an EQ6 around every imaging night and i understand your preference for a light mount...

That being said, a good mount is, ahem, paramount for imaging (pardon the pun). But i must say your first picture is very impressive!

I think you might even squeeze your existing rig further? Best, U.

Very nice. I would be super-interested in a comparison with+without the filter...

We would need some decent with+without pictures to decide what they're worth...

EDIT: looks like it all depends on the amount of light pollution at your site: the more LP, the tighter the filter bandwidth has to be and the more $$$ we have to pay. Best, U.