om-1 can do c4k 60p

[fuzzynormal]

1 hour ago, zlfan said:

Somehow the mf lens can not be stabilized by OM1

Huh?  Surely that can't be right?  I use an EM10iii and can stabilize my old prime lenses as needed --and it does so quite well.  It's a big reason why I bought it.  Or are you writing in context to the 120 burst mode? 

[zlfan]

23 minutes ago, fuzzynormal said:

Huh?  Surely that can't be right?  I use an EM10iii and can stabilize my old prime lenses as needed --and it does so quite well.  It's a big reason why I bought it.  Or are you writing in context to the 120 burst mode? 

The 120p photo burst mode has no issue for mf lenses. The C4K 60p and other video modes have issues with mf lenses.

I used a generic focal reducer with a 85 mm zf, I set the focal length in the ibis as 55mm. Suppose to be the case after the focal reducer. But the IBIS just has little effect.

[fuzzynormal]

32 minutes ago, zlfan said:

other video modes have issues with mf lenses.

That stinks that it's misbehaving.  Which video modes?  I rented the OM1 last year and wasn't noticing anything weird.  And, again, my lowly em10iii does fine.

I did NOT use 60p C4k mode though on the rented OM1.

What power is your reducer? Most are .7'ish, so you'd be around a 60mm equiv., but a difference of 5mm isn;t going to affect much.

[zlfan]

2 hours ago, fuzzynormal said:

That stinks that it's misbehaving.  Which video modes?  I rented the OM1 last year and wasn't noticing anything weird.  And, again, my lowly em10iii does fine.

I did NOT use 60p C4k mode though on the rented OM1.

What power is your reducer? Most are .7'ish, so you'd be around a 60mm equiv., but a difference of 5mm isn;t going to affect much.

I mean all video modes have this shaking.

I remembered that when I used this focal reducer on EM5, my Leica R 50 mm f2 is about 35mm, about x1.4-x1.5.

Maybe the OM1 at 50 mm or 60 mm with IBIS is like this?

If so, OM1 IBIS is not effective at long focal length. This kind of IBIS performance is about the same as EM5. Not as good as using Canon C300mk1 or FS7 with a Tamron IS lens. At most, they are equal.

I have a lot of 100 mm and above MF lenses, this just is not enough. Kind of disappointed. If OM1 has this kind of IBIS performance at long focal length, I don't expect much from GH7 S5 2, etc. This kind of critical information, only when you have the camera, you can test. I don't see from the sheer videos on youtube about this.

 

But in photo 120 p burst mode, as it is less than 1 second, the stabilization is great at 85/55 mm. I will use this mode a lot on OM1. It is the crown jewel. Video modes on OM1 are just not as outstanding.

[zlfan]

After adding sharpening, the C4K 60p looks usable, but not as sharp as GoPro 12. The ZF 85mm is set at F8 with peaking on, so the lens should have no issue. GoPro 12 is really good in terms of sharpness and details.

OM1 burst 120p is at least as good as GoPro12.

[Snowfun]

3 hours ago, zlfan said:

After adding sharpening, the C4K 60p looks usable, but not as sharp as GoPro 12. The ZF 85mm is set at F8 with peaking on, so the lens should have no issue. GoPro 12 is really good in terms of sharpness and details.

OM1 burst 120p is at least as good as GoPro12.

If, for some reason, you are happy with the quality of the gopro12, why are you even thinking about other cameras? If you have found the camera which does what you need it to, isn't that sufficient? 

[ac6000cw]

3 hours ago, zlfan said:

After adding sharpening, the C4K 60p looks usable,

C4K/UHD 60p is softer on the OM-1 than 24/25/30p - see this dpreview video stills comparison

Sharpest video modes are C4K/UHD at 24/25/30p 10-bit.

Re. the IBIS performance - I don't own any manual lenses, so can't test the IBIS in that situation, but I often use non-stabilized long telephoto lenses like the Oly 75-300mm and Pana 100-300mm (with lens OIS turned off) for wildlife video. With the video stabilization 'IS Level' set to +1 (the highest setting) I can get usable handheld video at 300mm provided I'm leaning against something or sitting down to provide a bit of extra stability.

Is the video stabilization working OK with native MFT lenses? If not, I'd suggest doing an 'Initialize All Settings' and starting again (especially if this is a used camera).

Note that some of the stabilization settings are separate for stills and video, so you might need to set the manual lens focal length separately for stills and video:

[zlfan]

6 hours ago, Snowfun said:

If, for some reason, you are happy with the quality of the gopro12, why are you even thinking about other cameras? If you have found the camera which does what you need it to, isn't that sufficient? 

GoPro is fixed lens camera. I have a collection of mf lenses, so I need OM1 for mf lenses. 

[zlfan]

6 hours ago, ac6000cw said:

C4K/UHD 60p is softer on the OM-1 than 24/25/30p - see this dpreview video stills comparison

Sharpest video modes are C4K/UHD at 24/25/30p 10-bit.

Re. the IBIS performance - I don't own any manual lenses, so can't test the IBIS in that situation, but I often use non-stabilized long telephoto lenses like the Oly 75-300mm and Pana 100-300mm (with lens OIS turned off) for wildlife video. With the video stabilization 'IS Level' set to +1 (the highest setting) I can get usable handheld video at 300mm provided I'm leaning against something or sitting down to provide a bit of extra stability.

Is the video stabilization working OK with native MFT lenses? If not, I'd suggest doing an 'Initialize All Settings' and starting again (especially if this is a used camera).

Note that some of the stabilization settings are separate for stills and video, so you might need to set the manual lens focal length separately for stills and video:

Thank you very much for your help. 
 

For ibis in video, I use M IS 1, mechanical plus digital. 

[zlfan]

6 hours ago, ac6000cw said:

 

Note that some of the stabilization settings are separate for stills and video, so you might need to set the manual lens focal length separately for stills and video:

 

[zlfan]

Maybe this is the key. I remember that I set the focal length in M mode for the 120p burst mode. I will check if the video mode focal length is set up. Thanks a lot. 

[ac6000cw]

If anyone is interested, this is a comparison I did of various OM-1 IBIS settings and Panasonic 'Power OIS' lens stabilization.

All handheld, all C4K@50p video, using Panasonic 100-300mm f4.0-5.6 II lens at 100mm and 300mm. I was standing still, the camera was handheld, using the EVF, with my left hand underneath the lens and right hand holding the camera body.

 

[zlfan]

Sensor shift plus digital +1, at 300 mm, is very usable. 

[ac6000cw]

On 3/22/2025 at 12:19 AM, zlfan said:

Sensor shift plus digital +1, at 300 mm, is very usable. 

It is - provided you hold the camera reasonably still, otherwise you get jerks if you move it too fast. It's the mode I normally use for wildlife video with that lens. The extra crop that digital stabilization adds is actually useful in that situation too.

[zlfan]

about video quality of the om1, i think that i used zf 85 mf, which somehow dictates the final image quality. the image looks smooth, but not very sharp, even at f5.6 or f8. very suitable for portraiture, especially to ladies. the color is fine. if using m43 sharp lenses, om1 c4k may be very sharp, will test later with my m43 olympus 25mm f1.8.

[ac6000cw]

From dpreview's video test chart, OM-1 vs G9ii (both at 24p/25p/30p) - they are very close on resolution/sharpness:

....but on OM-1 is 50p/60p much softer than 24p/25p/30p - note the softness of the middle bar at 60p vs 24p/25p/30p :

Those test results match what I've found when using the OM-1 for real-world video.

[zlfan]

zf 85 supposes to be sharp at f5.6 f8, i suspect that the generic focal reducer is the real culprit.

[zlfan]

Now with the ZF 85, generic focal reducer, OM1, video mode, c4k 30p, 10 bit HLG H265, I set the ibis focal length at 60mm, sensor shift and digital, +1. The footage is very usable, much better than EM-5 at 50 mm. If I hold my body and arms tight, I guess that the results will be very close to be tripod like or at least mono pod like.

C4K 30p is good enough for slow moving subject tracking, like a rowing man. C4K 30p has more details than C4K 60p. Good for landscape.

I guess that if I skip the generic focal reducer, the results will be even better.

Not to say the unique 120p photo burst mode.

Two thumbs up to OM1. I think it is the best deal today for hybrid cams.