FAQ FAQ  Forum Search   Events   Register Register  Login Login

We need a LA-EA5: eye AF on SAL135mm f1.8

Page  <1234 7>
Author
Faldrax View Drop Down
Senior Member
Senior Member

Joined: 11 July 2008
Country: United Kingdom
Location: Hampshire
Status: Offline
Posts: 511
Post Options Post Options   Quote Faldrax Quote  Post ReplyReply Direct Link To This Post Posted: 16 November 2017 at 12:12
Originally posted by Miranda F Miranda F wrote:

Okay, I admit I'm a little puzzled here - if you're buying an E-mount camera because it's smaller and lighter than A-mount, why are you trying to carry multiple A-mount lenses around with you???


There are a couple of possible scenarios

1) The E-Mount body is there as a backup to an A-Mount body

2) I have a large selection of A-Mount lenses, a mix of SSM and Screw drive - I may not want to carry all of them at any given time, but to have the OPTION of carrying any of the one I have, I need to buy 2 separate adaptors (then carry the lens with specific adaptor as required).

EG If I want to do Portrait, I need an EA4 to combine with my 85 f/1.4 G, or a EA3 to combine with my Tamron 70-200 f/2.8, or both if I want the option of either.

Because of this issue, my next purchase is much more likely to be an A99II, rather than one of the A7's.
2 x A900 + VG
CZ 16-35 f/2.8, Sig 24-70 f/2.8 HSM, Tamron 70-200 f/2.8 Di USD, 70-300G, Tamron 150-600,
50 f/1.4, 85 f/1.4 G RS, 100 f/2.8 macro
F56AM, 3600HSD, Youngno 560-II, 055CXPro3+410 geared
 



Back to Top
Cliff View Drop Down
Senior Member
Senior Member

Joined: 01 November 2006
Country: United States
Location: Richmond Va
Status: Offline
Posts: 708
Post Options Post Options   Quote Cliff Quote  Post ReplyReply Direct Link To This Post Posted: 02 December 2017 at 18:27
I'll give a big +++ for an LA-EA5.

The sensor based AF on the a6500 handles SSM A mount lenses with an LA-EA3 nicely. I have a lot of (too many) screw drive A mount lenses that I am happy with, some have been my faithful companions since the late '80's. LA-EA4 has worked well on my a7ii, but I am not in the market for another E mount camera until Sony releases an adapter that lets me use the new sensor technology they have developed with all my A mount lenses.

In addition to size, the short registration distance that allows use of older MF lenses with inexpensive adapters and without glass is a big part of what led me to try E mount. The intense R&D effort Sony has put into E mount bodies is attractive too. Sony has been good about migrating features to A mount, but there is usually a considerable lag.

My a65 mostly lives with a long lens attached for birds and critters. The a7ii is home, my ff workhorse. A Nex5T with 16-50mm is the camera that goes in my pocket when I otherwise would not be carrying a camera. The newer features of the a6500 with LA-EA2&3 are vying with the ff of the a7ii but have not overtaken it. That is mostly because of the new features I give up due to the a65 SLT technology in the LA-EA2.

Come on Sony, step up and give us an LA-EA5 adapter that enables the technical camera body magic you are producing. It will not cost you high dollar lens sales. The people who are buying those lenses will keep buying them, they won't go for legacy screw drive stuff. Nor would the rest of us spend as much for a lens as the camera body price even if you gave us the body. However, you will generate camera body and adapter sales from the rest of us who love the (disruptive) camera body technology you are producing and are happy with our old glass.

I have bought three E mount bodies and A to E adapters since I bought my most recent A mount camera. But I'm done until you enable a migration path for my screw drive lenses to new sensor technology. I'm a $5k-$10k customer before I croak if you will do that. It's not all the money in the world, but it beats the hell out of selling phone sized sensors to a commodity market.




Edited by Cliff - 02 December 2017 at 18:30
Contax RF, Minolta7000i, Sony A100, A65, Nex5T, A7ii, A6500. 2 many lenses, mostly ordinary Minolta & 3rd party A, MC/D, other mf, vintage Vivitars & cats, LA-EA2,3,4 E16-50&55-210mm
Back to Top
Fivepin View Drop Down
Senior Member
Senior Member

Joined: 26 October 2012
Country: Canada
Location: North Bay
Status: Offline
Posts: 735
Post Options Post Options   Quote Fivepin Quote  Post ReplyReply Direct Link To This Post Posted: 02 December 2017 at 20:18
Considering I am looking at the A7riii as my next purchase...I couldn't agree more with this thread...I was just looking at adapter options, and struggling with the two adapter option as well....COME ON SONY LAE EA5
G.R.
Back to Top
Cliff View Drop Down
Senior Member
Senior Member

Joined: 01 November 2006
Country: United States
Location: Richmond Va
Status: Offline
Posts: 708
Post Options Post Options   Quote Cliff Quote  Post ReplyReply Direct Link To This Post Posted: 02 December 2017 at 21:06
Here is a rough equivalent to an LA-EA5. About the same cost as an LA-EA4 and takes a little elbow grease to implement.

and here is one that looks like it does not require the elbow grease.

Edited by Cliff - 02 December 2017 at 21:29
Contax RF, Minolta7000i, Sony A100, A65, Nex5T, A7ii, A6500. 2 many lenses, mostly ordinary Minolta & 3rd party A, MC/D, other mf, vintage Vivitars & cats, LA-EA2,3,4 E16-50&55-210mm
Back to Top
addy landzaat View Drop Down
Senior Member
Senior Member

Joined: 22 April 2006
Country: Netherlands
Location: Netherlands
Status: Offline
Posts: 10741
Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 02 December 2017 at 22:17
Originally posted by Fivepin Fivepin wrote:

Considering I am looking at the A7riii as my next purchase...I couldn't agree more with this thread...I was just looking at adapter options, and struggling with the two adapter option as well....COME ON SONY LAE EA5
Just get the A99m2 for your GAS needs, no new adapter needed
Why not follow me on Instagram? @Addy_101
Back to Top
Fivepin View Drop Down
Senior Member
Senior Member

Joined: 26 October 2012
Country: Canada
Location: North Bay
Status: Offline
Posts: 735
Post Options Post Options   Quote Fivepin Quote  Post ReplyReply Direct Link To This Post Posted: 02 December 2017 at 22:33
I've already decided to make the switch to emount..a7riii
short list

1 stop light gain over a99ii
smaller, lighter,
touch screen
AF improvemnts
3rd party lens support via adapters (this is a big one)
a7riii adresses my long time battery complaint in a7 series cameras

SAME PRICE IN CANADA...so why wouldn't I get the A7riii
Now if the A99ii were a reasonable sale say $2500...which I paid for my original a99 upon release...then yes..I would stick with A mount..
But to forgo all the new advancements and pay the same for a year old camera...nah...tired of sticking with amount and missing new features.
G.R.
 



Back to Top
C_N_RED_AGAIN View Drop Down
Senior Member
Senior Member

Joined: 05 July 2007
Location: United States
Status: Offline
Posts: 1218
Post Options Post Options   Quote C_N_RED_AGAIN Quote  Post ReplyReply Direct Link To This Post Posted: 02 December 2017 at 22:40
A7riii has af with focus magnification as well. I think thatís really cool
Back to Top
Fivepin View Drop Down
Senior Member
Senior Member

Joined: 26 October 2012
Country: Canada
Location: North Bay
Status: Offline
Posts: 735
Post Options Post Options   Quote Fivepin Quote  Post ReplyReply Direct Link To This Post Posted: 02 December 2017 at 22:43
I do a ton of video work and the touch screen to pull focus in this day and age is a must. Even my lowly canon g7x has a really nice touch screen.
With my a99 I can't even use the zoom focus assist in movie mode...its so damn frustrating. At least you can on the A77ii.
G.R.
Back to Top
QuietOC View Drop Down
Senior Member
Senior Member

Joined: 28 February 2015
Country: United States
Location: Michigan
Status: Offline
Posts: 2920
Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2017 at 00:52
I just verified that the A68 has Eye AF with screw-drive lenses well at least with the Minolta AF 50mm F1.4
Sony A7III NEX-5T 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
Back to Top
Davey View Drop Down
Senior Member
Senior Member

Joined: 14 July 2007
Country: United States
Location: New York
Status: Offline
Posts: 713
Post Options Post Options   Quote Davey Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2017 at 01:50
Originally posted by EddyH EddyH wrote:

The A7R III looks really interesting (I admit, I just ordered one...), but there is one accessory missing: an adapter that will make eye AF possible with the SAL 135mm f1.8. This is one of my favorite lenses and I'm probably not the only one. I would love to have eye AF with that lens!

Or did I miss something? I checked the compatibility list and that says eye AF is not supported on the LA-EA4 / LA-EA3.

I guess it shouldn't be that difficult to produce that: take the LA-EA4, get rid of the mirror and the dedicated AF module inside the adapter and use the camera AF to drive the screw inside the adapter. That should work, isn't it?

Maybe we should start a petition?

Eddy

Shoulda bought an A99 II. Works amazing with A-mount glass (as it should). Enough said.
Back to Top
Davey View Drop Down
Senior Member
Senior Member

Joined: 14 July 2007
Country: United States
Location: New York
Status: Offline
Posts: 713
Post Options Post Options   Quote Davey Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2017 at 03:32
Originally posted by Fivepin Fivepin wrote:


1 stop light gain over a99ii

The Sony SLT only reflects 30% of the light to the dedicated PDAF mirror. At most, estimates suggest it's about a 1/2 stop difference in light.

When it comes to SLT ILCs, A99 II leaves past cameras in the dust because it's using a BSI sensor and because Sony has greatly improved noise management since earlier generations.

In DPReview's own tests, there is no perceptible difference between A99 II and A7R III until only the extreme higher ISOs, and this is only visible when pixel peeping at 100%.

UHD 4K video, and HD video, are greatly scaled down so you'd have a tough time seeing a difference between video shot on A7R III and A99 II with the same lens within the native ISO range.

The benefits of E-mount is that the system was designed from the ground up as a hybrid mount to better support video. Unlike A-mount, the glass performs AF at the designated F-stop, and the narrow flange distance allows you to adapt virtually any lens you want.

A-mount, however, was designed from the ground up for still photography, so the lenses peform AF wide open which means better AF sensitivity in low light. A99 II also has a slightly faster burst, and 79 hybrid cross points. A7R III doesn't have any cross points.

They're both really good cameras, but if you shoot action, A99 II will have the upper hand.

If you're going to be doing video or shooting in the dark in the extreme high ISOs, A7R III might be a better choice.

But your assertion of "1 stop light gain" for A7R III is absolutely false.




Edited by Davey - 03 December 2017 at 03:50
Back to Top
Fivepin View Drop Down
Senior Member
Senior Member

Joined: 26 October 2012
Country: Canada
Location: North Bay
Status: Offline
Posts: 735
Post Options Post Options   Quote Fivepin Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2017 at 03:44
Originally posted by Davey Davey wrote:

Originally posted by Fivepin Fivepin wrote:


1 stop light gain over a99ii


But your assertion of "1 stop light gain" for A7R III is absolutely false.



It wasn't my assertion.. I had read it somewhere..then I found it. Re-read and realized they were referring to pixel shift feature.

Which is another bonus I forgot to list initially.

Then I forgot to post the link
https://www.sonyalpharumors.com/photons-photos-measurement-sony-a7riii-pixel-shift-gives-one-stop-dynamic-range-increase/
G.R.
Back to Top
Davey View Drop Down
Senior Member
Senior Member

Joined: 14 July 2007
Country: United States
Location: New York
Status: Offline
Posts: 713
Post Options Post Options   Quote Davey Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2017 at 03:58
Originally posted by Fivepin Fivepin wrote:


It wasn't my assertion.. I had read it somewhere..then I found it. Re-read and realized they were referring to pixel shift feature.

Which is another bonus I forgot to list initially.

Pixel shift is only useable for landscapes, and if you're shooting landscapes you should be using longer exposures at low to moderate ISOs anyhow.

This being said, I'd say that E-mount cameras are the best cameras on the market for landscape-focused photographers, simply because there is a chance for less bulk & less weight to carry on the hike. The Zeiss 16-35/4 for E-mount is much lighter than its sibiling Zeiss 16-35/2.8 for A-mount.

A99 II still has the faster burst and more advanced AF system only rivaled by A9, and is a better choice for stills-focused photographers who want to capture high speed action at high res. A99 II still feels better balanced with long lenses, boasts ergonomics perfected over decades and already has native 300/2.8 and 500/4 options.

IMHO, suggesting that A99 II is irrelevant or should have its price suddenly slashed in the wake of the A7R III is a little silly. They're both current models for different photographers. Both have their strengths.

Edited by Davey - 03 December 2017 at 04:47
Back to Top
Jonas A-R View Drop Down
Senior Member
Senior Member

Joined: 29 December 2007
Country: Denmark
Location: Denmark
Status: Offline
Posts: 1468
Post Options Post Options   Quote Jonas A-R Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2017 at 05:56
Originally posted by Davey Davey wrote:

The benefits of E-mount is that the system was designed from the ground up as a hybrid mount to better support video. Unlike A-mount, the glass performs AF at the designated F-stop, and the narrow flange distance allows you to adapt virtually any lens you want.

A-mount, however, was designed from the ground up for still photography, so the lenses peform AF wide open which means better AF sensitivity in low light. A99 II also has a slightly faster burst, and 79 hybrid cross points. A7R III doesn't have any cross points.


However, things may change if you are shooting fast glass at large apertures. At least accord to this: Sony Alpha 7R II can match or beat DSLR low light AF performance

As a general comment to this thread: I suspect that the contrast detect trimming following phase detection in the on sensor AF systems will not work well with screw drive lenses.
a9 a6300 21/2.8 Loxia 35/2.8Z 35/1.4Z 50/1.4Z 55/1.8Z 85/1.4GM 90/2.8G 12-24/4G 24-105/4G 70-200/4G 100-400/4-5.6GM 2x TC
Back to Top
Dyxum main page >  Forum Home > Equipment forums > Lens Talk > Adapters and converters Page  <1234 7>

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.047 seconds.

Monitor calibration strip

Dyxum.com - Home of the alpha system photographer

In memory of Cameron Hill - brettania

Feel free to contact us if needed.