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Adapter for AF Reflex 500 Mirror

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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: 31 May 2019 at 00:31
I like the output of my Sigma 600mm F8 much better on my A7II than on APS-C.
Sony A7III A77II A6000 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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neilt3 View Drop Down
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 31 May 2019 at 01:37
Originally posted by woodrim woodrim wrote:

The Minolta AF Reflex arrived and appears in excellent condition. The AF adapter for my A7 II will not arrive until Saturday coming. I did some test shots using my old A200 and while it seems to focus quickly with only occasional hunting, I'm not impressed with the images. I never used any mirror lens on the A200, so I don't have any fair comparisons to make. I sure am hoping it will perform better with the A7 II when the adapter arrives.


What was your shutter speed ?
Don't rely on steady shot of your A200 , if the shutter speeds below 1/1000th sec the sharpness will gradually reduce as you go down in speed .
The better high ISO on the a7II will help greatly .
Also , the 500mm is 500mm on the a7II , but is equivalent to 750mm on the A200 , and needs the shutter speed to suit .
see my photostream on flickr;
http://www.flickr.com/photos/neilt3/
C & C welcome.
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woodrim View Drop Down
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 31 May 2019 at 18:15
Thanks, Neil. I am very experienced with the long mirrors and used them successfully on my NEX-5N. However, my concerns are now moot.

I have just done what I should have done immediately after my disappointing results on the A200. I just got done with some test shots using the lens on the A7 II in manual mode. A world of difference! I'm sure now that it was a focusing issue, although I had been concerned about that since I couldn't find anything in those images that were sharp.

Using the manual focus with magnification provided a very sharp image and easy focusing. I could even use this lens manually with no complaints. The AF adapter will arrive today and I'll be able to determine if the AF focusing is good. The images I have just produced with the A7 II and manual focus are excellent. I think this lens will be right up there on the heels of the Rubinar 5.6/500 except for close distances.
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woodrim
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Miranda F View Drop Down
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 31 May 2019 at 23:20
This is often a problem with long tele lenses that have high resolution. The DOF is so thin (when you pixel peep) it's almost impossible for an in-body focussing system to get it perfect. You either need to MF or take a lot of shots in the hope that one will be sharp. With the Tamron 500mm mirrors, I find even MF is tricky and needs multiple shots for best moon images. But if you don't pixel peep, the AF is useful of course.
Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2019 at 01:12
That's not what I was experiencing, Miranda F. Images were soft when opened to view. It's all moot now since I've proved that the lens is very sharp.

The LA-EA4 arrived today and I quickly gave it a test on the A7 II. Perfect focus, equal to me manual focusing. I'll be out in the field and swamp tomorrow and now have confidence that the lens will perform very well.

Some of this would have been better in a thread about the lens instead of adapter. I use my mirror lenses quite regularly and five months out of the year I photograph the breeding of big birds at a local rookery. I'm very familiar and experienced with the mirrors. Every now and then there will be a bad copy of something, so I had worried about this one. These are the mirror lenses I have - I could speak about the differences from lens to lens:

5.6/300 Makinon - actually two copies, both not much good
5.6/300 Ohnar
5.6/300 Super Danubia
5.6/400 Sigma
5.6/500 Rubinar
6.3/500 Maksutov 3M-6A
8/500 Spiratone Minitel M
8/500 Tamron SP 500 55BB
8/500 Yashica ML Reflex
8/500 Minolta AF Reflex
8/700 Questar
8/500 Soligor - junk
8/600 Sigma - defective
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woodrim
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Post Options Post Options   Quote sybersitizen Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2019 at 01:18
My Minolta AF Reflex autofocuses very quickly and accurately with my A55 and A77. It's the feature par excellence of that lens. I'm glad I never have to do it manually with the focus magnifier, which would be way slower.
 



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woodrim View Drop Down
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2019 at 01:24
Originally posted by sybersitizen sybersitizen wrote:

My Minolta AF Reflex autofocuses very quickly and accurately with my A55 and A77. It's the feature par excellence of that lens. I'm glad I never have to do it manually with the focus magnifier, which would be way slower.


That's why I bought it. Many lost shots while focusing my other lenses. However, 99.9% of all my photography for 47 years has been MF.
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woodrim
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neilt3 View Drop Down
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2019 at 09:50
The a/f focus adjust on the adapter makes a big difference there .
Fast or long lenses especially .
see my photostream on flickr;
http://www.flickr.com/photos/neilt3/
C & C welcome.
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2019 at 15:51
Originally posted by neilt3 neilt3 wrote:

The a/f focus adjust on the adapter makes a big difference there .
Fast or long lenses especially .


From the brief testing I did, it doesn't appear that I will need to muck with it. I'll give it a good workout this afternoon and surely learn a few things.
Regards,

woodrim
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neilt3 View Drop Down
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 01 June 2019 at 16:52
Originally posted by woodrim woodrim wrote:

Originally posted by neilt3 neilt3 wrote:

The a/f focus adjust on the adapter makes a big difference there .
Fast or long lenses especially .


From the brief testing I did, it doesn't appear that I will need to muck with it. I'll give it a good workout this afternoon and surely learn a few things.


Have fun .
see my photostream on flickr;
http://www.flickr.com/photos/neilt3/
C & C welcome.
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woodrim View Drop Down
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2019 at 01:30
I want to thank everyone for your help. I would like to invite you to my album of images from my first weekend with the AF Reflex:
First AF Reflex 500 Images

The images are a mix of AF and MF. I will have some more questions about making the AF behave as I would like.

Regards,

woodrim
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Basil View Drop Down
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Post Options Post Options   Quote Basil Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2019 at 15:54
I checked out your album and am kicking myself. I have had that lens for years and never thought about using it for flower shots. You were able to utilize the donut bokeh in a fantastic way.

Are you using an extended lens hood on it? If not, I would highly suggest trying one. Cheap aluminum 82mm ones are available on ebay. You can even roll up a piece of black construction paper or art foam and tape it to size. It really improves the contrast, especially on shots over water.

Edited by Basil - 04 June 2019 at 16:02
To see is to enjoy. To see beyond is to rejoice.

A77Mark II; A850; A700; A100; NEX 6; various film bodies and an ever-changing collection of lenses
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woodrim View Drop Down
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2019 at 15:56
While I have found the AF to be fast when there is a clear target, it isn't always precise, which is important with mirror lenses. I was hoping to narrow down the focus point to the very center so I could point to the precise area where I want the focus. For instance, when photographing birds like in the above photo, I want to make the eye or beak the sharp point. AF will select the entire bird as its target. Is it possible when using the adapter to narrow the focus point?
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woodrim
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woodrim View Drop Down
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Post Options Post Options   Quote woodrim Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2019 at 16:04
Originally posted by Basil Basil wrote:

I checked out your album and am kicking myself. I have had that lens for years and never thought about using it for flower shots. You were able to utilize the donut bokeh in a fantastic way.


Thank you, Basil. I have been using mirrors for flowers a lot in recent years. Of course, the good mirrors with close focusing makes it easier in one regard but as you know, the closer, the narrower the DoF. The Minolta doesn't focus very closely but I have found it focuses very well at its minimum distance, unlike other mirrors that are designed more for distance. The colors are vibrant and the flowers pop out where they're in focus and the background fades into blur very quickly. When choosing angles that provide little definition in the background or busy with colors, it can provide beautiful images.
Regards,

woodrim
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