Deep Sky Stacker Help!

[iksose7]

Hi guys, i'm trying to stack 119x210 second light frames in DSS. I am using darks, bias and flats.

I have the amount of images to use set at 98%.

But... every time i stack the data, it uses only 72 frames of the 119. So its giving me an image with around 4 hours of exposure time. At 98% the image should have about 6.5 hours of exposure!

Why am i loosing an 1.5 hours? I've never had this happen before, hopefully one of you helpful people know the cause of this frustration!

Cheers!

[Bizibilder]

Set it to 100% and it should use all the frames.

[iksose7]

Will try that Rodger and see how i get on!

Just finished another try at stacking 98% and this time got 3 hours 37 minutes as the final image! 

[Freddie]

DSS will automatically reject files if it can't detect enough stars so you may get a few rejected that way.

[iksose7]

Tried the 100% and 3 hours 20! I think it may be something to do with the star threshold. Trying it again now.

[jaspalchadha]

Why would you want to use bad frames

[m37]

Try running through the star detection threshold routine with a few different settings. Aim for 50 to 60%, at least that seems to be the consensus.

As alluded to by someone previously, 119 images at 3 minutes+ each probably gives you room to manoeuvre when selecting the best frames. If some are being dropped that might not be a bad thing. I think if I had that much data I would go lower than that; maybe 90% or lower to skip the junk and keep the nice images.

I don't think using all of the frames is necessarily better if some of them are sub par. Which some probably are.

cheers

Christoph

[SniffTheGlove]

My setting under SETTINGS | REGISTER SETTINGS is 5% for star detection with the tick for reduce noise by Median Filter