• Welcome to TalkEmount.com, the best Sony E-mount camera and photography community on the web.
    Click here to join for free and enjoy unlimited photo uploads in our forums.

Sony 100-400 GM, is OSS broken?

Zenith

TalkEmount Regular
Joined
Nov 16, 2019
Messages
82
For static objects. On my adapted Canon 100L I can use shutter speed down to 1/30 with no problem photo being unsharp. On 100-400 GM I always have to use 1/500 even if OSS is activated to get sharp photo. 1/250 will probably give me unsharp photo (on static object). BIF, running dogs I always use 1/2000 to 1/4000 on my A6400 so OSS is probably not that important there. If I think when in old time when I didn't have IS or OSS on my lenses those where the shutter speeds for non-IS lens. (1/500-1/4000)

Please, anyone have an idea if I am thinking correctly, or do I need to do some more test on my GM.

Thanx :)
 

Zenith

TalkEmount Regular
Joined
Nov 16, 2019
Messages
82
  • Thread Starter Thread Starter
  • #4
Ok, so here are results of test with Mode1 OSS enabled @400mm handheld at 15 feet (4meters for us metrics). Maybe I was wrong about OSS being "broken"? I see sharpeness till 1/100 sec.

SN202753.jpg
ILCE-6400    Sony FE 100-400mm F4.5-5.6 GM OSS (SEL100400GM)    400mm    f/5.6    1/500s    ISO 400
SN202754.jpg
ILCE-6400    Sony FE 100-400mm F4.5-5.6 GM OSS (SEL100400GM)    400mm    f/5.6    1/250s    ISO 200
SN202755.jpg
ILCE-6400    Sony FE 100-400mm F4.5-5.6 GM OSS (SEL100400GM)    400mm    f/6.3    1/125s    ISO 100
SN202756.jpg
ILCE-6400    Sony FE 100-400mm F4.5-5.6 GM OSS (SEL100400GM)    400mm    f/7.1    1/100s    ISO 100
SN202757.jpg
ILCE-6400    Sony FE 100-400mm F4.5-5.6 GM OSS (SEL100400GM)    400mm    f/10.0    1/50s    ISO 100
SN202758.jpg
ILCE-6400    Sony FE 100-400mm F4.5-5.6 GM OSS (SEL100400GM)    400mm    f/14.0    1/25s    ISO 100
SN202759.jpg
ILCE-6400    Sony FE 100-400mm F4.5-5.6 GM OSS (SEL100400GM)    400mm    f/20.0    1/13s    ISO 100
SN202760.jpg
ILCE-6400    Sony FE 100-400mm F4.5-5.6 GM OSS (SEL100400GM)    400mm    f/25.0    1/6s    ISO 100
 
Last edited:

WNG

TalkEmount Hall of Famer
Joined
Aug 12, 2014
Messages
4,370
Location
Arrid Zone-A, USA
Real Name
Will
Bear in mind, you're shooting the 400mm on a crop sensor, so the image is 600mm. The shutter rule is >1/600 sec. with no IS. With ~3 stops of gain with IS, work your shutter speed from 1/600 sec.
 

Zenith

TalkEmount Regular
Joined
Nov 16, 2019
Messages
82
  • Thread Starter Thread Starter
  • #9
Bear in mind, you're shooting the 400mm on a crop sensor, so the image is 600mm. The shutter rule is >1/600 sec. with no IS. With ~3 stops of gain with IS, work your shutter speed from 1/600 sec.
Yes, the correct test would be:

1/640 ->1/320 ->1/160 ->1/80 =3 stops
 
Top Bottom