On 9/11/2021 3:23 PM, Mike Gordon via olympus wrote:
Not sure how many are interested in astro observations using different cams but
here goes. . . .
Curiously the tripod high res mode doesn't really do the job for this
application and limited to ISO 1600. Still very cool.
Hand held high res:
https://tinyurl.com/4m78hshd
https://youtu.be/RxwYZ5HaYMM
Interesting reviews. The video one is actually tolerable. Lots of trade-offs.
Lens choices:
Well try to find ultrafast super wide zoom or prime that is AF in MFT. Slim
pickings. The PL 12/1.4 is fine with a good copy and I rented the PL
10-25/1.7. It felt HUGE and bigger than my Siggie 14-24 for Sonnie though not
as wide. Well it is really 100gm lighter but feels larger as is 88mm in
diameter. We had the Oly 7-14/2.8 as well but it is a bit slow given the
noise disadvantage of the sensor and quite a bit of distortion at 7mm---don't
use ACR to convert as will ruin the stars in the corners.
The Siggie (60%reported on FM to be largely centered) is about as good as a
hand full of primes. There is a 20/1.8, 14/1.8 24/1.4.
Advantage Sonnie.
https://tinyurl.com/pfzz838s
Some would say this is comparing apples and oranges and mebbe one is even a
vegetable but that is what is available.
I am guessing the Sonnie has about a 2 stop noise advantage given larger
sensels with bigger photon wells and 4 times the area and advantages of more
down-sampling but stacking or HHHR mode and careful processing may render this
less important. Results---TBD.
Eyes in the sky, Mike
Have you thought about a different mirrorless FF, or a 33x44 mm "Medium format"? I know so little about either, that I
can't point a finger at anything like a solution. It does seem like you are in a pattern of fighting the smaller sensor
of µ4/3 AND the star eating, infinity focus limitations and hot sensor of the Sony.
I see a (slow) Laowa 13 mm eq. MF lens for Fuji GFX and smart adapters for EOS
lenses.
Sometimes, when two things are at odds, the resolution of conflict is in a
third thing.
"Listen to me or not, it hardly matters.
I’m not trying to be wise, that would be foolish.
I’m just chattering."
— Mary Oliver
Smoke Blowing Moose
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What if the Hokey Pokey *IS* what it's all about?
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