iwols

thanks olly,still trying to get the collimation bang on ,would you say my backfocus  and focus look ok though,will give it another go tonight.Just looked on astrobin and seems common with the c8 edge on the cigar galaxy size wise

well just moved over from my 400mm scope to my 2032 mm c8 edge which might not help ,do you think my stars are large or is it that im just used to my 400mm scopes images,scope was focused well ,any comments please,its a 300sec lum sub stretched  thanks

Hi all just trying to collimate my c8 edge with a 414ex ccd ,but i cant seem to get the image large enough to adjust collimation any advice please ,is it the 414ex is no good with the c8 for this?

this might help?

hi ive just fitted this to my c8 edge hd ,(ZWO EAF Bracket for Celestron C8 and C9.25 SCTs was the description) straight on no problems and works fine,only problem was i had to alter my imaging train and remove my rotator as it would not fit space wise, hope this helps ,

thanks alan

Hi after a nightmare with dew was looking at these for my c8 edge anyone using one on there c8 edge and have any comments please,and does anyone know the length it sticks out beyond the scope thanks

hi all going back to the beginning a bit ,but what size eyepiece is suitable to do collimation on my c8 edge smallest i have is 13mm but not had the opportunity to try it yet

4 hours ago, iapa said:

Damn, didn’t notice the subject C8 EDGE HD.

In principle, tho’, go off focus and check the concentricity of the shadow and adjust.

https://www.celestron.com/blogs/knowledgebase/sct-edgehd-collimation-guide

no probs thanks anyway

thanks thats great👍

thanks not checked collimation will do tonight if possible,presume i leave the 3 locking bolts loose? i can use the image through my ccd to check collimation? thanks again

Hi all well after using my ts optics scope for 2 years ive decided to set my c8 up for imaging,imaging train set to the recommended 133.3mm backfocus ,and guiding was very good anyway a couple of questions someone may be able to help with

1..added a 5 min lum sub stretched ,stars are not perfect any advice

2..the c8 is f10 against my ts optics which was  f4 i believe what equivalent time do i need with the c8 for the same capture as the ts optics

thanks

Hi all just about to order a baader clicklock for the back of my c8 edge,but are these good enough to hang my imaging train from ,any comments cheers

hi all just trying to set my c8 up for imaging ,removed bits off my other scope and left with needing to fit the bits together need to attached the off axis guider to the rotator ((48mm each side)needs to be about 20mm long to get the oag in) then from the rotator to the c8 which is a 2" male thread i believe,could i use a baader clicklock on the telescope end with a nosepiece to allow small adjustments to my back focus or any other suggestions please

Thanks did it work OK on autofocus

hi all just wondered what your thoughts were on the 2 focusers for the c8

well my best shot

well still going anyone fancy a try got as far as stacking/cropping just to prove my data

https://www.dropbox.com/sh/pe1fwp5x73tfu4f/AACQdCtaFuvAFQwy4RTH0a_ea?dl=0

at what point is it not linear plz

3 hours ago, Adreneline said:

I'm no PI expert but before doing DBE or ABE I would:

• use StarAlignment to ensure all the components are aligned and registered
• use DynamicCrop to ensure all edge artefacts are removed.
• use ABE with Subtraction
• use BackgroundNeutralization to try to 'even up' the background space followed by ColourCalibration
• create a CIE-L mask to focus on the background and use MLT to reduce noise only in the background
• use HT for an initial incremental stretch (with the mask removed)
• use MLT (less aggressive) with a new CIE-L mask for further background noise reduction
• use ACDNR with the same mask to focus on the background to further remove noise.

After all that you should have something to allow you move forward on the galaxies themselves to bring out the detail and colours, again with suitable masks.

I have used the LightVortex tutorials and found them very helpful.

HTH

Adrian

at what point do you do the rgb combination plz

thanks adrian

Hi all need a lot of advice please added screenshot of the leo triplet but is discoloured,so far ive used weighted batchpreprocessing with darks flats bias then dbe then done a rgb combination but the resulting image is discoloured ,i know ive took a shortcut but what would you do next thanks

https://www.dropbox.com/s/e3g3c12jfpqg8x2/Screenshot 2021-04-08 14.58.27.png?dl=0

hi all just looking at turning my c8 into an imaging set up,hopefully i can use my set up of my ts optics rig ie 414ex ,rotator,oag,filter wheel,but apart from the moonlite (which is well out of my league at the minute) what electronic focusers do i have option of,any advice really appreciated cheers

Thanks vlaiv some lovely images there

45 minutes ago, vlaiv said:

I think that it will be excellent in that role. According to Celestron - it is well corrected scope across large field.

Put x0.7 reducer designed for EdgeHD scopes and you'll have nice 1400mm of focal length with 8" scope.

Pair it with larger sensor - up to APS-C size and aim for about 1.2-1.4"/px (bin if needed - either in hardware with CCD sensor or in software with CMOS) and you'll get very potent imaging system.

I have something very similar - RC8" with 1600mm of focal length and ASI1600 and I'm happy with that setup.

EdgeHD8 should have similar performance.

Consider guiding with OAG.

 

thanks do you have any uncropped examples please