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Panasonic GH5S - Quick First Light Test (City)

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#1 jdbastro

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Posted 15 May 2018 - 01:40 AM

I'm falling in love all over again with a new low-light capable camera.

 

Enter the Panasonic GH5S.  Just got this bad boy today.  Took it for a quick test run under my heavily light polluted Los Angeles skies.

 

It reminds me of the first time I tried my Sony A7S (which was recently sold to fund the GH5S).

 

Check out the real-time video showing a few constellations.

 

The camera was set to 30th sec shutter, 12,800 ISO.  Lens in use is a Voigtlander Nokton 17.5mm f0.95 lens set wide open.

 

Here's a shot of the gear:

 

GH5S with Nokton 17.5mm/f0.95 Lens
 
If the weather is good this weekend, I'll travel to darker skies for a more challenging test - @ Mount Pinos!

 


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#2 Mark9473

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Posted 15 May 2018 - 04:25 AM

That's impressive.

I'd love to see that in action during a meteor shower.

Do you have a more wide-angle lens available for a comparison?



#3 jdbastro

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Posted 15 May 2018 - 11:35 AM

That's impressive.

I'd love to see that in action during a meteor shower.

Do you have a more wide-angle lens available for a comparison?

I have a 12.5mm c-mount TV lens in f1.3.  I'll look into giving it a try.

 

But I'll bet this lens would be great for wider angle:  Nokton 10.5mm/f0.95


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#4 DonBoy

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Posted 15 May 2018 - 11:58 AM

Why this camera over the A7S for astronomy?   The sensor specs are very similar to the IMX294 - huummm!


Edited by DonBoy, 15 May 2018 - 12:04 PM.


#5 jdbastro

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Posted 15 May 2018 - 01:52 PM

Why this camera over the A7S for astronomy?   The sensor specs are very similar to the IMX294 - huummm!

GH5S advantages over A7S:

1) Smaller sensor allows for smaller/less expensive/faster prime lenses (e.g. f0.95) for wide-field real-time video, e.g. 21mm to 85mm focal range (full-frame equiv f.l.)
2) Smaller sensor allows for lower magnification relays lenses when shooting video of 18mm image intensifier output (less relay magnification means less light loss to the camera sensor)

 

A7S advantages over GH5S:
1) Larger sensor allows for wider field of view in a telescope
2) Takes better stills at higher ISO’s and has better overall resolution

 

I plan to get the not-yet-announced A7S III when it ships probably later this year if the price is not astronomical.

 

What is the IMX294?  Where do you find sensor specs?



#6 Alien Observatory

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Posted 15 May 2018 - 02:44 PM

GH5S advantages over A7S:

1) Smaller sensor allows for smaller/less expensive/faster prime lenses (e.g. f0.95) for wide-field real-time video, e.g. 21mm to 85mm focal range (full-frame equiv f.l.)
2) Smaller sensor allows for lower magnification relays lenses when shooting video of 18mm image intensifier output (less relay magnification means less light loss to the camera sensor)

 

A7S advantages over GH5S:
1) Larger sensor allows for wider field of view in a telescope
2) Takes better stills at higher ISO’s and has better overall resolution

 

I plan to get the not-yet-announced A7S III when it ships probably later this year if the price is not astronomical.

 

What is the IMX294?  Where do you find sensor specs?

Here...Pat Utah :)

 

http://www.sony-semi...ucts/index.html


Edited by Alien Observatory, 15 May 2018 - 02:44 PM.

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#7 DonBoy

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Posted 15 May 2018 - 03:24 PM

https://www.sony-sem...mx294cjk_e.html

 

ZWO ASI294MC Pro

 

https://astronomy-im...94mc-pro-color/


Edited by DonBoy, 15 May 2018 - 03:25 PM.

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#8 ccs_hello

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Posted 15 May 2018 - 04:49 PM

Congrats to OP's new GH5s mirrorless.

 

Indeed it's using IMX294.

The same image sensor is quite popular to be used in some EAA dedicated astroCMOS imagers.



#9 Alien Observatory

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Posted 15 May 2018 - 07:56 PM

If the weather is good this weekend, I'll travel to darker skies for a more challenging test - @ Mount Pinos!

 

 

Ohhhh sounds like fun...keep us updated as this is a very unique camera....Pat Utah laugh.gif  waytogo.gif



#10 jdbastro

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Posted 18 May 2018 - 03:17 AM

Got a new Voigtlander 42.5mm/f0.95 lens today.  Decided to try it out under my heavy light polluted skies.

 

This time I set the GH5S to extended teleconverter to kick up the magnification to 2.1X.  This lens shows some chromatic aberration on stars but it's tolerable.

 

Here are a couple of short video clips:

 

M13 and Lyra from the city

 

Bigger Dipper from the city

 

Here's a shot of the camera with the new lens:

 

Panasonic GH5S w Voigtlander Nokton 42.5mm/f0.95 Lens

 



#11 totoantibes

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Posted 15 May 2019 - 10:35 AM

Hi JDBAstro.  I though you might be interested in an ASCOM driver i built for Lumix cameras. I have been working on G80 and now have acquired the GH5s.

they both work well with ASCOM gear. I would appreciate your feedback. thanks

 

you can get it from gitHub here: https://github.com/t...Driver/releases

 

Clear skies


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