Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

SW 180 Mak , what ZWO planetary camera to buy ?

  • Please log in to reply
5 replies to this topic

#1 Newaussiescope

Newaussiescope

    Lift Off

  • -----
  • topic starter
  • Posts: 3
  • Joined: 01 May 2019

Posted 13 July 2019 - 06:32 AM

Hi all. Got myself a SW 180 Mak coming to have a play with . Will be mounted to my AZEQ6-GT . I need some input to which ZWO color planetary camera will suit the 180 mak best. Will be trying to get some moon shots and some Jupiter / Saturn shots. Imaging from my backyard in very outer east suburbs Melbourne Australia. I Also have access to a dark sky site. Any votes for the ASI 178mc ? 290mc ? 385 MC 224mc ? Maybe a cam that will allow use of a 2x Barlow at some stage. I've done the oversampling undersampling calcs but not sure how rigid the rules are with this and how it might apply to planetary imaging . Any input appreciated cheers.

#2 Auburn80

Auburn80

    Viking 1

  • *****
  • Posts: 886
  • Joined: 01 Apr 2013

Posted 13 July 2019 - 09:03 AM

I have and use a 178mc. Based on its pixel size, f12- 13 is ideal. The general guideline is f ratio should be 5x pixel size. With the SW, your sampling would be just a little off at prime focus but plenty close enough. IMHO, a good match with the 180 without the need for a Barlow. In fact, I'm considering a 180 for planetary observing and imaging.

Not familiar with the other cameras so others can help.

Edited by Auburn80, 13 July 2019 - 09:07 AM.


#3 Newaussiescope

Newaussiescope

    Lift Off

  • -----
  • topic starter
  • Posts: 3
  • Joined: 01 May 2019

Posted 13 July 2019 - 09:29 AM

Cheers Auburn80 I did some calcs based on the chip size of various cameras and worked out the magnification each sensor would produce. 2700 ÷ sensor diagonal.
180mak f15 practical magnification 360x.
Asi178 302x 0.18 arcsec/pixel
Asi385 337.5x 0.29 arcsec/pixel
Asi290 450x. 0.22 arcsec/pixel
Asi224 450x 0.29 arcsec/pixel

I think looking at the figures the asi178 or the asi385 is the better choices for the scope
The ASI 385 is prob more forgiving in arcsec/pixel for a given seeing conditions.
Maybe someone can weigh in on that and my calcs I did. Looks like it's a 178 or 385 at this stage.

#4 Auburn80

Auburn80

    Viking 1

  • *****
  • Posts: 886
  • Joined: 01 Apr 2013

Posted 13 July 2019 - 01:13 PM

Cheers Auburn80 I did some calcs based on the chip size of various cameras and worked out the magnification each sensor would produce. 2700 ÷ sensor diagonal.
180mak f15 practical magnification 360x.
Asi178 302x 0.18 arcsec/pixel
Asi385 337.5x 0.29 arcsec/pixel
Asi290 450x. 0.22 arcsec/pixel
Asi224 450x 0.29 arcsec/pixel

I think looking at the figures the asi178 or the asi385 is the better choices for the scope
The ASI 385 is prob more forgiving in arcsec/pixel for a given seeing conditions.
Maybe someone can weigh in on that and my calcs I did. Looks like it's a 178 or 385 at this stage.


I would think that choosing between two cameras one should consider ADC, read noise, quantum efficiency and chip size (for lunar or solar).

Good Luck!

#5 SteveThornton1

SteveThornton1

    Mariner 2

  • *****
  • Posts: 233
  • Joined: 16 Dec 2007
  • Loc: Hemet, California

Posted 13 July 2019 - 02:30 PM

I've been using my  SW180 Mak to do lunar imaging and have come up with great results.  I've been using the monochrome ASI 120MM.  Using the monochrome is better for lunar imaging because it's

more sensitive than a color camera and the moon is basically a monochrome object.  Here's a photo of area surrounding the Eudoxus and Aristoteles craters  at prime focus.  I've had success also with a

2X Barlow.

Attached Thumbnails

  • EUDOXUS.jpg

  • GlenM likes this

#6 Achernar

Achernar

    Voyager 1

  • *****
  • Posts: 11312
  • Joined: 25 Feb 2006
  • Loc: Mobile, Alabama, USA

Posted 13 July 2019 - 05:04 PM

If the telescope has a f/ratio of 15 or so, a ZWO ASI 290MM or MC would work well, or any other cameras with pixels about 3 microns across. If it's an f/12, cameras such as the ZWO ASI 178MC or MM along with others that have 2 2 or 2.4 micron pixels would be a good choice.

 

Taras


Edited by Achernar, 13 July 2019 - 05:05 PM.



CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics