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A Mount to FE Adapter

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Benjiphoto View Drop Down
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Post Options Post Options   Quote Benjiphoto Quote  Post ReplyReply Direct Link To This Post Topic: A Mount to FE Adapter
    Posted: 26 July 2020 at 11:52
Hi

I've just upgradded from the A58 to A7Rii but won't be able to get a decent telephoto for a while.
Is it worth getting an adapter to use my 55-300 DT 4.5-5.6 on the A7Rii? I know I'll have to use a cropped part of the sensor but will the aperture, speed, focal length also be affected?
If anyone's got an first hand experience of doing something similiar, any advice would be appreciated!

Thanks
Ben
A700, 70-200G, 16-80Z | Ecce Inc
 



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nandbytes View Drop Down
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Post Options Post Options   Quote nandbytes Quote  Post ReplyReply Direct Link To This Post Posted: 26 July 2020 at 12:37
Whether it's worth it or not depends on you really. I did adapt this lens on to my A7RII for a few weeks using LA-EA1 (used this adapter because you can remove the tripod foot unlike the other ones so it's the smallest and also cheapest).

The AF was fast, reliable and accurate in AF-S single point focus. The tracking or AF-C wasn't great.

Your aperture and focal length will not be affected in any way.
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QuietOC View Drop Down
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 26 July 2020 at 13:09
The 55-300 covers full-frame at many focal lengths when used with the LA-EA3 or LA-EA4. It tracks alright at LO frame rate (2.5 FPS) which is the limit Sony has for adapted lenses. The 55-300 tracks fine on A-mount cameras at 12 FPS. I didn't find the Sony 70-300 G SSM II any better for tracking. The A7 cameras also have Lens Compensation support for the 55-300 and most of the DT lenses.

The little Sony E 55-210 OSS doesn't cover full-frame, but it will track at higher frame rates.

I have a sharp Minolta 75-300 D that's similar in weight to the 55-300. It requires the LA-EA4 for AF. No Lens Compensation.

I bought a used Canon EF 70-300 IS II USM this year. It uses fast linear AF motors like E-mount lenses. It was a third of the cost of the FE 70-300 G OSS and even less expensive than the A-mount 70-300 G SSM lenses. The advanced mode of the Metabones adapters avoid the burst tracking LO frame rate limitation.

FWIW: my Metabones IV was cheaper than my Sigma MC-11 or Sony LA-EA3.


Edited by QuietOC - 26 July 2020 at 14:08
Sony A7III HVL-F45RM LA-EA3 LA-EA4 MB-IV MC-11 EF-E II MD-NEX KR-NEX DA-NEX
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9 AF-P/Q
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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 26 July 2020 at 13:22
Well, a LA-EA3 is not that expensive and since you already have the 55-300 (I assume) I do think it is viable option. So, the answer is yes.

There are other options, but none as cheap. For instance the Canon EF 70-300mm F4-5.6 IS II USM is just 500 GBP, but you will need an adapter like the Sigma MC-11 that costs 200 GBP, making the total cost 700 GBP. Still cheaper then the Sony FE-70-300, but not by that much. If 18mpx is fine, I like my 70-350mm - it is an option if you need more then 2.5fps.

Regarding aperture, speed, focal length - no, these will not be affected. it will behave exactly the same as on your A58. Even the pixelcount is similar: 18 megapixels.

Edit: QuietOC changed his post to include the Metabones adaptor while I was writing my reply. The only Metabones Canon EF - Sony FE adaptor I could find in a UK shop was a Cine version over at WEX, costing 419 GBP. A regular Mark 5 Metabones adaptor costs 475,- (about 430 GBP) - making adding the Canon 70-300 to your A7r2 costing over 900 GBP

Edited by addy landzaat - 26 July 2020 at 13:37
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nandbytes View Drop Down
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Post Options Post Options   Quote nandbytes Quote  Post ReplyReply Direct Link To This Post Posted: 26 July 2020 at 14:32
I was actually rather happy with mc-11+EF 100-300mm f4.5-5.6 USM. Used it since the days I had A7RII to until very recently with my A7RIV.

But I had to stop it down to f8 for decent quality. I also paid £20 for the lens
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Benjiphoto View Drop Down
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Post Options Post Options   Quote Benjiphoto Quote  Post ReplyReply Direct Link To This Post Posted: 27 July 2020 at 09:09
Super - thanks for all the respnses!
A700, 70-200G, 16-80Z | Ecce Inc
 



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