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A77ii with Ext.tubes and reverse lens?

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SweNick View Drop Down
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Post Options Post Options   Quote SweNick Quote  Post ReplyReply Direct Link To This Post Topic: A77ii with Ext.tubes and reverse lens?
    Posted: 05 July 2019 at 12:32
Some time ago I saw this YT clip about "Super Macro" by Thomas Shahan, where he uses extension tubes and a reverse prime. This week I tried the same with my a77ii. However I am having a bit of trouble. Both view finder and monitor are blacked out unless I stop down to below a second in shutter speed (in M mode). In A mode I get an image no matter the aperture (i believe?)

Instead I did the same on my older a500 and it works splendid.

I am guessing that it is because the a500 has a traditional mirror where as the a77ii does not and instead has a whole bunch of magic (electronics), but is there a way or are there any special settings I need to change to enable the same setup to work ob the a77ii?

Thanks in advance for any input I might receive

BR
Nick
 



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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: 05 July 2019 at 12:45
Go into the camera menu .
Somewhere in it you will find one with a header of "setting effects " on or off .
Whichever it's set to change it .
Without information from the lens , it can't give s correct image in the viewfinder .
Also make sure the revered lens has its aperture open .
In your a500 it had an OVF so didn't have this issue .
By having the setting on it will boost the viewfinder to whatever exposure the camera is set too .
see my photostream on flickr;
http://www.flickr.com/photos/neilt3/
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sybersitizen View Drop Down
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Post Options Post Options   Quote sybersitizen Quote  Post ReplyReply Direct Link To This Post Posted: 05 July 2019 at 19:45
Originally posted by SweNick SweNick wrote:

Both view finder and monitor are blacked out unless I stop down to below a second in shutter speed (in M mode).

If it's an A-mount lens it's probably set to minimum aperture ... which is what happens when an A-mount lens is reversed ... so very little light is getting in.

In A mode I get an image no matter the aperture (i believe?)

Tell us. Do you?

Instead I did the same on my older a500 and it works splendid.

If that's the case, change the A77II menu option to Live View Display > Setting Effect: OFF. That makes it behave sort of like an optical viewfinder.
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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: 05 July 2019 at 21:15
If it's an A-mount lens, cut a hole in a white Minolta lens cap (these have a tab to force the iris open). Thanks to Syber IIRC for that tip.

Better still, use an MF lens. I generally use a bellows to get a variable magnification but tubes can work. You may find some types of lens work better than others. Some will not be sharp anywhere near MFD (lens to sensor distance when reversed!). Fifties usually work well, especially symmetrical designs like Planar and Double-Gauss, but experiment.

The other thing that works is reversing a short FL lens onto the front of a longer one. EG, 28, 35, 50 MF on the front of an 85, 90, or 135mm f2.8. Use the front one to stop down and the rear one wide open (both focused near infinity). You can buy reversing rings quite cheaply.

Edited by Miranda F - 05 July 2019 at 21:20
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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SweNick View Drop Down
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Post Options Post Options   Quote SweNick Quote  Post ReplyReply Direct Link To This Post Posted: 06 July 2019 at 09:36
Thank you all for your input! Greatly appreciated. I will have a look at it today.

I was very vague concerning the reverse prime lens. My apologies. They are two Konica Hexar AR lenses, 28mm f3.5 and 40mm f1.8.

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SweNick View Drop Down
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Post Options Post Options   Quote SweNick Quote  Post ReplyReply Direct Link To This Post Posted: 06 July 2019 at 11:59
Hi all!

Turning the Live View "Settings Effect" to "Off" did the trick! Thank you for the input!

Just thought I would post an example shot from yesterday (with the a500 though). Quite happy about the result



All three tubes, Konica Hexar AR 28mm f3,5 (reversed) on the a500 body with flash. Aperture set to 8 at 1/160th

Edited by SweNick - 06 July 2019 at 12:07
 



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