The Amazing Sony A1/A7/A9/APS-C & Anything else welcome Mega Thread!

Hi all.

How do you test for de centering (i think that is the main issue with 35mm 1.4?) ??

I am thinking of buying this lens from amazon but return it a few times until i get a good copy and wondering how do you test if the lens doesn't exhibit the issue normally found on it?

as the saying goes...
every lens ever made is decentered ;)
if you can't find it you just haven't got equipment sensitive enough :D

Anyway here's some material for you to read and figure out how to properly test your lens for de-centering
https://www.lensrentals.com/blog/20...ntered-lens-an-old-technique-gets-a-makeover/
https://blog.kasson.com/the-last-word/testing-for-decentering-by-eye/
https://blog.kasson.com/lens-screening-testing/

Re-iterating what much clever people than me have said, a lot of people incorrectly test their lens and cry wolf which results in many copies sent back. That said there is a fair bit of sample variable in the FE35/1.4 but its not like every other lens is going to be bad. Also a lot of these lenses are not decentered they simply have slightly asymmetrical focussing (mine does very very slightly) which won't affect your photographs apart from brick walls. You can test for this also.
 
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Ok cool using f8-f11?
Depends on how you want to do it. If you take a landscape type picture to test it then I would use f8-11, however if I shoot a brick wall or test chart then I use a wide aperture as it accentuates the issue. I'm not sure that there are any set rules on how you should do it though, but if you're using a flat surface/test chart you must be square on to it.
 
It's a shame that you need to plan for returning a >£1000 lens a few times before you get one that's actually built properly though isn't it.

That's an understatement IMO. Its absolutely ridiculous to say the least :mad:
 
That should give you enough DOF to judge the sharpness. I'd say that if it's there, you'll see it but don't go looking for it if the overall image looks good to you. It's a shame that you need to plan for returning a >£1000 lens a few times before you get one that's actually built properly though isn't it.

Don't get why the QA is so bad on such expensive kit especially as retailers in these markets usually operate on thin margins, all those free shipping / returns then the admin cost of dealing with the return / replacement / resale. The costs add up surely?
 
Don't get why the QA is so bad on such expensive kit especially as retailers in these markets usually operate on thin margins, all those free shipping / returns then the admin cost of dealing with the return / replacement / resale. The costs add up surely?

I don't think QA is as bad as people make it out to be and they are also testing them differently to normal people.
One of the lenses with the lowest sample variable is the canon 50mm f1.8 STM which is probably cheapest first party AF lens. That's because it a very simple lens compared to something like 35mm f1.4 with floating elements.
Price of lens has nothing to do with it, lenses that are complex are also harder to test in lab and also prone to more variables going wrong (hence more variation).

p.s. I am not defending Sony by any means, they need to get their act together and fix it.
 
24-105 has a Sony recognised fault with some batches as well. Apart from ebay no one seems to have them in stock now.
 
People are starting to get the Tamron 28-75mm, there's a bunch of new videos popped up for it (none of them any good).

View: https://www.youtube.com/watch?v=HEeD-bdLhyM


This one's interesting for the wrong reasons, I'm assuming it's the lenses rather than the bodies but Tamron must be pleased with how well it stacks up against the GM.

I’ve got one on pre order from very early and kinda expected to have seen it shipped by now, due out today officially.
 
35 50 and 85

Also got another A7III looking forward to having 2x of the same body !

Nice, quite tempted by the 35 it’s a lens I’ve always liked on other bodies.

Suffering from a lack of inspiration just now and actually considering thinning down everything to just the A7RIII and a 35mm for now, was going to order the Samyang but if the Sigma is freely available I might go for one of those!
 
Was speaking to one of the techies at Sigma and they confirmed there will be no need for AF microadjust! Music to my ears
 
SmallRig L-bracket arrived.

Pros

Very very well machined, this will out live the camera, easily.
Cheap, I got it with 50% off pre-order for £25.
Keeps tripod mount centred to camera
Comes with tools.
It is Arca Swiss plate compatible, both horizontal and vertical.
Access to battery door

Cons

It needs tools to use, the Allan Key is held on by magnets but I feel it'll most likely be lost day to day shooting.
It's heavy, it adds a noticeable weigh to the camera.
The pinky "section" seems to stick out front he contour of the body a bit more.
More slippery than the leather case.

How do I compare it to the Lim's Leather case? fantastic L-bracket, it is much better than those £20 L-bracket you find on Amazon solely on the tripod mount alone without mentioning the build quality. It is machined accurately, to the point it allows for the little strap triangle to stick out.

Although right now I prefer Lim's leather case as I am used to it's texture.

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