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Re: [OM] OM-1 redux

Subject: Re: [OM] OM-1 redux
From: Moose <olymoose@xxxxxxxxx>
Date: Mon, 18 Apr 2022 01:40:55 -0700
On 4/10/2022 10:42 PM, Ken Norton wrote:
. . . In all honesty, the E-M1ii is a fantastic camera in just about every way
and with the improved noise specs of the OM-1, I get to actually enjoy
the cake.



On 4/17/2022 7:46 PM, Mike Gordon via olympus wrote:
Noted some weird chroma noise in Marnie's astro HHHR shot.  It was greenish not 
magenta in the sky.  Took me over 45 min to ameliorate with gradient masks.  It 
was still better than 10 shot stacked shots with 10 dark frames though.  
Perhaps the new guy will be better yet if they get rid of the odd color cast.  
Doesn't look like 2 stops better in the below informal tests but it is better.

https://www.youtube.com/watch?v=xWcVWNWhrE0

This is tricky business, comparing two quite different sensors.

I've been noodling around with it, and have as yet to attain any sort of global 
conclusion. Some bits and pieces.

Deep down in the shadows, ISO 200, the OM-1 does indeed whup the E-M1 II.

ISO 6400: Middle tones, normal exposure, there is little to choose in noise 'tween the two. But the noise is different. Edges such as text are clearer, amid the noise, on the OM-1.

ISO 3200: OM-1 has slightly less noise and distinctly better detail resolution. OM-1 has slightly more noise than ISO 1600 E-M1 II, but retains slightly more fine detail.

ISO 1600: OM-1 has less noise and distinctly better detail resolution. OM-1 has slightly different noise, but about the same as ISO 800 E-M1 II, and slightly better detail.

ISO 800: Different noise and detail, but a toss-up. OM-1 wins on noise, E-M1 II by a nose on detail. I wonder if this exposure was flawed in focus or movement.

ISO 400: OM-1 leaps ahead on everything.

My tentative conclusion is that the OM-1 is about a stop better below ISO 6400. for ordinary use, I've set my µ4/3 bodies with an ISO cap of ISO 1600. I'll initially be using ISO 3200 for the OM-1.

Shadows, tripod HR, OM-1 stomps Sony A7R II.

Shadowy Moose
--
What if the Hokey Pokey *IS* what it's all about?
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