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Sony A7r Mark II 90 MM Lens

 
 
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Pillar of the Community

Canada
1615 Posts
 Posted 07/31/2019  9:54 pm Show Profile   Bookmark this topic Add rocky to your friends list Get a Link to this Message
i am trying to get my camera gear calibrated. I am surprised that by moving changed how my gear worked. here is 2 images first one will be A second B. I would like to know your thoughts on these images. should I push the calibration further.

Pillar of the Community
Canada
1615 Posts
 Posted 07/31/2019  10:18 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
sorry top photo taken with a canon eos70D photo b was done by the sony.
Bedrock of the Community
United States
29460 Posts
 Posted 08/01/2019  04:55 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
Top photo is too blurry. Bottom pic might be a bit out of focus.
John1
( I'm no pro, it's just my humble opinion )
Searched 5+ Million Cents Since 1971
Pillar of the Community
United States
1719 Posts
 Posted 08/02/2019  9:58 pm  Show Profile   Bookmark this reply Add Greasy Fingers to your friends list Get a Link to this Reply
B is better
Pillar of the Community
Canada
1615 Posts
 Posted 08/08/2019  5:59 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
thank you so much for your opinions. have a great one
Pillar of the Community
United States
7050 Posts
 Posted 08/08/2019  7:17 pm  Show Profile   Check westcoin's eBay Listings Bookmark this reply Add westcoin to your friends list Get a Link to this Reply
If this is the F/2.8 lens be sure you open it up a bit to allow for a larger depth of field. I shoot around F/8 with most lenses, though practice and results will vary so do your own tests.

At F/2.8 the depth of field is very narrow, try shooting at F/4, F/5.6, F/8 for each stop you open you will need to increase the time of exposure as well;

If F/2.8 is 1/4 sec then F/4 will need a half second, F/5.6 will need a fill second and f/8 will need at least 2 seconds maybe a bit more. This is why a tripod or other holding device is important, and to eliminate any camera shake (Sony is a mirrorless camera so no mirror lock used) you can use the timer delay so the camera will settle down after you touch the shutter release.
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013!
ANA Life Member #3288 in good standing since 1982, EAC Member #6202, NBS Member, 2 variety collector.

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Pillar of the Community
Canada
1615 Posts
 Posted 08/08/2019  8:26 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
thank you its that I have recently moved. I am just trying to get everything tighten down. I can see I am still have issues with viberation a bite. here is one at F4. I am almost there
Pillar of the Community
United States
7050 Posts
 Posted 08/09/2019  10:25 pm  Show Profile   Check westcoin's eBay Listings Bookmark this reply Add westcoin to your friends list Get a Link to this Reply
Much better,still looks a touch under exposed, try a slightly longer timed exposure.
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013!
ANA Life Member #3288 in good standing since 1982, EAC Member #6202, NBS Member, 2 variety collector.

See my want page: http://goccf.com/t/140440
Pillar of the Community
Canada
1615 Posts
 Posted 08/16/2019  9:40 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
Ray thank you so much for showing us how to build smile directors. heres an image
Pillar of the Community
Canada
1615 Posts
 Posted 09/11/2019  9:09 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
still working with this lens. I am getting there now. here is a couple of photos. these coins are in thick capsules.

Pillar of the Community
United States
7050 Posts
 Posted 09/18/2019  06:02 am  Show Profile   Check westcoin's eBay Listings Bookmark this reply Add westcoin to your friends list Get a Link to this Reply
Rocky it looks like the copper is slightly out of focus on the bottom of the obverse, being in a slab is a tough thing to shoot through already, I just learned a trick from a shooter that uses sheets of paper around the slab to build up the lower sides of the slab to even the coin out. But over all I think your shots are improving, the lens is pretty darn sharp.
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013!
ANA Life Member #3288 in good standing since 1982, EAC Member #6202, NBS Member, 2 variety collector.

See my want page: http://goccf.com/t/140440
Pillar of the Community
Canada
1615 Posts
 Posted 09/19/2019  9:17 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
westcoin you have avery good eye. I know I still dont have every thing tighten down. I should be done soon so I can get this all set. it should inprove then. when you mount a really high end lens. with live view you can see even breathing can effect your images.
Pillar of the Community
Canada
1615 Posts
 Posted 10/08/2019  9:36 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
here is a 1967 silver dollar. shot using a pollarized filter.

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