Olympus EM1 and ISO - DPChallenge Forums

05/19/2015 02:45:55 PM · #1

Hello All

I was awake early this morning and walked outside to a great Milky Way and grabbed the camera, set it to LiveTime to give it a go for the first time but couldn't change the ISO past 1600 (wanted to try 3200)

I can adjust it just fine when not in LiveTime, is there a setting I am missing or can we not go any higher then 1600 in that mode?

Nikon AF-S NIKKOR 24-70mm f/2.8G ED

05/22/2015 12:18:39 AM · #2

No need to reply, turns out the EM1 is no good at long exposures, far too much noise.

Neil

Fujifilm X-T20

05/22/2015 03:35:22 PM · #3

That's surprising.

I did a search, and Gordon Laing mentions issues with NR off.

//cameralabs.com/reviews/Olympus_OMD_EM1/EM1_long_exposure_noise_vs_EM5.shtml

Panasonic Lumix G 14mm F2.5 ASPH

05/24/2015 05:39:51 AM · #4

Originally posted by Neil:

That's surprising.

I did a search, and Gordon Laing mentions issues with NR off.

//cameralabs.com/reviews/Olympus_OMD_EM1/EM1_long_exposure_noise_vs_EM5.shtml

I tried a few 20 second exposures of the milky way at ISO 1600 and some at 800, all were not worth keeping, that was using Live Time.

Might try bulb and Live Composite next time and see if that makes any difference.

Olyuzi

Panasonic Lumix DMC-GX7

05/24/2015 09:20:37 AM · #5

Originally posted by AussieChris:

Originally posted by Neil:
That's surprising.

I did a search, and Gordon Laing mentions issues with NR off.

//cameralabs.com/reviews/Olympus_OMD_EM1/EM1_long_exposure_noise_vs_EM5.shtml

I tried a few 20 second exposures of the milky way at ISO 1600 and some at 800, all were not worth keeping, that was using Live Time.

Might try bulb and Live Composite next time and see if that makes any difference.

Have you tried using black frame subtraction noise reduction? It will double your exposure time but get rid of the noise that results from heating up the sensor due to long exposures. I'm not sure what Olympus calls it in their cameras but I'm sure you have it in the E-M1. I'm wondering if the Live Time contributes to even more heating up of the sensor resulting in more noise but the black frame subtraction should take care of the problem.