Today's SUN (20230610) | 4 cameras (comparison)

[pedro]

Today's SUN (20230610) | 4 cameras (comparison)

WEB LINK:
http://pedroreastrophotography.com/sun_ ... 23-06.html


Solar imaging session (20230609) | Pedro RE'
TV NP127 F/5.2| PGR3 | PLAYER ONE SATURN-M | ASI174MM | ASI1600MM
http://pedroreastrophotography.com/


IMAGING SETUPS


IMAGING SETUPS


IMAGING SETUPS


IMAGING SETUPS


IMAGING SETUPS


IMAGING SETUPS


IMAGING SETUPS


SUN (20230610) H-alpha (09:30 UTC). TV NP127 F/5.2, DS SM90II/SM60, BF30, PLAYER ONE SATURN-M SQR


SUN (20230610) H-alpha (09:30 UTC). TV NP127 F/5.2, DS SM90II/SM60, BF30, ZWO ASI1600MM


SUN (20230610) H-alpha (09:30 UTC). TV NP127 F/5.2, DS SM90II/SM60, BF30, ZWO ASI1600MM


SUN (20230610) H-alpha (09:30 UTC). TV NP127 F/5.2, DS SM90II/SM60, BF30, ZWO ASI174MM


SUN (20230610) H-alpha (09:30 UTC). TV NP127 F/5.2, DS SM90II/SM60, BF30, ZWO ASI174MM


SUN (20230610) H-alpha (09:30 UTC). TV NP127 F/5.2, DS SM90II/SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S5M


SUN (20230610) H-alpha (09:30 UTC). TV NP127 F/5.2, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S5M


SUN (20230610) WL, CaK & H-alpha (09:30 UTC). TV NP127 F/5.2, LUNT 1200 CaK Module, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S5M

[rigel123]

Nice, looks like they all do a good job

[vineyard]

The Saturn-M looks very good - thanks for the comparison.

[pedro]

The Saturn-M is great but I prefer the Grasshopper (CCD)

[Soendergaard]

thank you Pedro. Excellent work

[pedro]

remote_20230610-15 by Pedro Re', on Flickr

remote_20230610-14 by Pedro Re', on Flickr

remote_20230610-13 by Pedro Re', on Flickr

remote_20230610-12 by Pedro Re', on Flickr

remote_20230610-11 by Pedro Re', on Flickr

remote_20230610-10 by Pedro Re', on Flickr

remote_20230610-09 by Pedro Re', on Flickr

remote_20230610-08 by Pedro Re', on Flickr

remote_20230610-08 by Pedro Re', on Flickr

remote_20230610-07 by Pedro Re', on Flickr

remote_20230610-06 by Pedro Re', on Flickr

remote_20230610-05 by Pedro Re', on Flickr

remote_20230610-04 by Pedro Re', on Flickr

remote_20230610-03 by Pedro Re', on Flickr

remote_20230610-02 by Pedro Re', on Flickr

remote_20230610-01 by Pedro Re', on Flickr

[Dennis]

Thx for the comparison. So what are the differences on fd images? I wouldnt expect any.

[pedro]

Thanks Dennis

All cameras perform well with low gamma settings. When you increase gamma in CMOS cameras it is difficult to get good prom images. With CCD cameras you get much better results.

[MAURITS]

Excellent comparation Pedro.

[BGazing]

Thx for the comparison. So what are the differences on fd images? I wouldnt expect any.

One could only tell if we could see stacked images before processing. I'd expect 533 to beat my 1600 on DR alone...and the photos here might evidence that.

[pedro]

The Saturn-M is better than the ASI1600 for h-alpha imaging. The dynamic range of these two cameras is not great though

[Dennis]

Thanks Dennis

All cameras perform well with low gamma settings. When you increase gamma in CMOS cameras it is difficult to get good prom images. With CCD cameras you get much better results.

Thx for the explanation, i wasnt aware about that.

[pedro]

You're very welcome

[BGazing]

Thanks Dennis

All cameras perform well with low gamma settings. When you increase gamma in CMOS cameras it is difficult to get good prom images. With CCD cameras you get much better results.

Why would you raise gamma and not gain? You can always raise gamma in processing...am I missing something?

[pedro]

gamma = contrast, gain=sensitivity

I always use low gama settings for surface detail and middle to high gamma for proms

CMOS cameras have a low dynamic range and it is difficult to process prom images - high gamma

[DeepSolar64]

It sounds like I am lucky to have a PGR Grasshopper CCD camera.

[Rusted]

Pedro,

Thank you for making these interesting comparisons.

It might be easier to compare four images, side by side, with the same disk size. While avoiding degradation from digital enlargement.
Scrolling vertically requires visual memory. So it becomes much more subjective. Depending entirely on the skills/faculties/bias of the viewer.
Similarly, it becomes more difficult when making direct comparisons between different disk sizes. Some visual "gymnastics" are required here.
Though the latter was indeed a useful demonstration of the disk, image size with the four different cameras at the same, effective focal length.

[DeepSolar64]

I have never been able to find a way to attach images side-by-side on the SolarChat forum.

[arnedanielsen]

Great work Pedro!

Best regards,
Arne

[pedro]

Thanks guys

I tried to display the images with the same image scale. I think it is more interesting this way

[pedro]

James. I have two Grasshopper CCD cameras. These are my main work horses

GRASSHOPPER 3 2.8 MP MONO (GS3-U3-28S5M-C)

GRASSHOPPER 3 2.8 MP MONO (GS3-U3-28S4M-C)

[DeepSolar64]

James. I have two Grasshopper CCD cameras. These are my main work horses

GRASSHOPPER 3 2.8 MP MONO (GS3-U3-28S5M-C)

GRASSHOPPER 3 2.8 MP MONO (GS3-U3-28S4M-C)

Mine is a Firewire Grasshopper CCD camera ( GRAS 5055M-C. ). ( 2448x2048 resolution )

I also have a ZWO ASI178MM ( CMOS ) and a Firewire PGR Flea ( CCD ). The flea is a color camera.


You also have a wonderful SBIG camera that does wonderfully for deep-sky! The SBIG ha a CCD sensor, right?

[pedro]

Yes, the SBIG ST11000 has a Full Frame CCD and a second chip that can be used for self guiding

http://pedroreastrophotography.com/STL1 ... .12.11.pdf

[DeepSolar64]

And You use the SBIG very well.

James

[marktownley]

Nice comparison Pedro, thanks for sharing!

[pedro]

Thanks Mark & Aaron

[thesmiths]

It might be easier to compare four images, side by side, with the same disk size.

One trick I found to do comparisons is to open each image as a new tab in the browser, then switch from tab to tab. You get an instantaneous switch (something like a blink comparator).

[pedro]

Thanks James & Aaron

[BGazing]

gamma = contrast, gain=sensitivity

I always use low gama settings for surface detail and middle to high gamma for proms

CMOS cameras have a low dynamic range and it is difficult to process prom images - high gamma

Hm, but isnt it always available for processing manipulation later? I ask because I understood that manipulating it pre capture sort of narrows your processing wiggle-room. What am I missing?

[pedro]

I'm getting better results now (proms) if I increase gain. I tend now to use unity gain with CMOS cameras.