GX7 and Panasonic 14-140 3.5-5.6.

Shutter related blur was reported for 14-140 at Imaging-resource.com and several posts here. Anyone using GX7 and 14-140 (3.5-5.6) has this problem?

aodi wrote:

Shutter related blur was reported for 14-140 at Imaging-resource.com and several posts here. Anyone using GX7 and 14-140 (3.5-5.6) has this problem?

I mainly use silent mode and shutter, so haven't seen it.

It's a pretty good combo and surprisingly compact given the range of the lens.

aodi wrote:

Thank you.

Any disadvantages in using silent shutter all the time?

The e-shutter has a 1/15 sensor write-out speed, so you can see rolling shutter blur/slant if the object is moving. A max ISO of 3200 and a long shutter speed can't go longer than one second. So mostly minor issues, but so people will run into the limits often while others never do, depending on their shooting styles and subjects.

Might produce banding under certain kinds of artificial light too... Biggest downer is really the ISO limit IMO, specially since the GM don't have said limit with their hybrid/e-shutter. Hopefully they do away with it on the next iteration, 6400 would've been better...

In case you dont want to use the e-shutter permanently i would not recommend this combination, since the GX7 has a relatively  hard shutter and the shutter shock with that lense is quite bad actually.

I don't know whether I'm just lucky or not peeping closely enough but I've never noticed shutter-shock with any of my micro 4/3 gear, including the GX7/14-140.

I don't know whether I'm just lucky or not peeping closely enough but I've never noticed shutter-shock with any of my micro 4/3 gear, including the GX7/14-140.

Have you looked for it by comparing shots at relatively middling shutter speeds (1/60-1/400) vs identical shots with the electronic shutter? It's not always severe enough to ruin a shot, it often isn't actually, but once you see how much sharper they can be (if affected by SS) it's hard to unsee... Tho it's highly variable depending on the lens, person, etc.

trog100 wrote:

its very easy to see if you run the right test looking for it.. i saw it before i knew what it was.. now i know exactly what it is.. exactly how to reproduce it and exactly how to avoid it..

everyone gets the odd blurry or soft shot.. it gets blamed on missed focus user induced blur or just one those things or just a poor lens.. more often than not its shutter shock or camera induced motion blur..

take one GX7 body.. one 14-140 lens.. put the two together and set the shutter speed at 1/160th of second.. pick a focal length you can be sure of holding the camera steady at.. take a few shots of something with detail in it..

then do the same thing using the electronic shutter.. compare the difference..

if you cant see it get some new glasses or a new monitor..

i see it and i can repeat it every single time.. and with more than one body lens combination..

http://www.cavecom.com/screwdriver/forum/showthread.php?t=21372

trog

Dear Trog, I don't have GX7 for that test. However, since early report on SS, it would just cause a soft image but not a blur one. Because the very slight vibration generated by shutter movement would never be hard enough to shake camera as normal handshake would do.

I still remember that back to the old days, a lot of tests and argument had been put forward to prove its existence, or otherwise. A lot of suggestion had also be given trying to naturalize SS like adding weight etc to damper the effect. But as SS was caused by shutter movement (within a particular set of shutter speed, on certain model and certain lenses), it was strongly believed that SS would not be avoidable even when shooting on tripod.

So, if you could test yours by shooting on a tripod, and could get similar sharp images as using e-shutter, most likely other factors might cause soft images other than SS. If not, it would be a definite proof to have SS on your particular set of camera and lens.

Looking forward for your judgement as I'll soon upgrade to GX7.

alcelc wrote:

trog100 wrote:

its very easy to see if you run the right test looking for it.. i saw it before i knew what it was.. now i know exactly what it is.. exactly how to reproduce it and exactly how to avoid it..

everyone gets the odd blurry or soft shot.. it gets blamed on missed focus user induced blur or just one those things or just a poor lens.. more often than not its shutter shock or camera induced motion blur..

take one GX7 body.. one 14-140 lens.. put the two together and set the shutter speed at 1/160th of second.. pick a focal length you can be sure of holding the camera steady at.. take a few shots of something with detail in it..

then do the same thing using the electronic shutter.. compare the difference..

if you cant see it get some new glasses or a new monitor..

i see it and i can repeat it every single time.. and with more than one body lens combination..

http://www.cavecom.com/screwdriver/forum/showthread.php?t=21372

trog

Dear Trog, I don't have GX7 for that test. However, since early report on SS, it would just cause a soft image but not a blur one. Because the very slight vibration generated by shutter movement would never be hard enough to shake camera as normal handshake would do.

Shutter shock example from GF1 and 45-175X. Some lost detail in fur, blurry eyes and almost a double shadow on rocks. Shot stabilized on a rocky ledge, so not camera shake (I have a whole series taken around the same time with similar visual artefacts).

The visual effect of shutter shock depends on the illumination level and contrast of the object(s) in the frame. Objects with extreme illumination levels (either very high or very low) and/or high contrast are more likely to form double images.

In subjects with lower contrast levels, you're more likely to see a soft image or lost detail (1:1 center crop example follows):

trog100 wrote:

it does suffer from it but there are ways around it.. and its not just with the GX7 body ether.. some tests here..

http://www.cavecom.com/screwdriver/forum/showthread.php?t=21372

trog

Has anyone compared the two 14-140 Pana lenses for shutter shock?

Chris Noble wrote:

trog100 wrote:

it does suffer from it but there are ways around it.. and its not just with the GX7 body ether.. some tests here..

Has anyone compared the two 14-140 Pana lenses for shutter shock?

I have both, but haven't bothered.