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A850 mirror detached

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Dave18 View Drop Down
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Post Options Post Options   Quote Dave18 Quote  Post ReplyReply Direct Link To This Post Topic: A850 mirror detached
    Posted: 20 June 2015 at 21:54
Hi I was doing a wedding today and the mirror on my A850 became detached I put it back in it worked for one shot and came out again it looks like there are 4 adhesive marks is it stuck and do I need to reglue it back?
help
thanks
Dave
Sony A7RII, A900, A99 x2, A77II, A580, A200, ZA 135 1.8,tam 28-75 2.8, sig 35 art Tokina 11-16mm, Sigma 70-200 2.8 HSM OS, sony 16-50 2.8 ssm http://www.cornwall-wedding-photographer.co.uk
 



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thornburg View Drop Down
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Post Options Post Options   Quote thornburg Quote  Post ReplyReply Direct Link To This Post Posted: 20 June 2015 at 22:36
Yes, but the alignment of the mirror affects AF, so you may want to pay a pro to do the repair.

I'm not familiar with the exact construction of the A850, so it might be dead simple to get it right, or might require some special calibration.
Sony a3000, a6000, a57, a99 - Sony E 16-50, 28/2 | Vivitar 13, 85 | Minolta 24, 28-105, 35-105, 50/1.7, 75-300 | Tokina 28-70/2.6-2.8 | Sigma 70/2.8 Macro | Tamron 70-200/2.8 | Celestron 1000/11
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Post Options Post Options   Quote mirthseeker Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 04:25
This dpreview forum post might be of interest.
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Dave18 View Drop Down
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Post Options Post Options   Quote Dave18 Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 07:51
thanks when you pop the mirror back in its a tight fit so I think the alignment setting must be linked with the shutter mechanism
mirthseeker is there more to this post?
I have an A900 and A850 for weddings and an A77II I have a cap expenditure budget and was planning to get an A99 but I really like the A850 / 900 the IQ is very good and at less than iso1600 I doubt that the A99 would be that much of an improvement but I am also a fan of the EVF
decsions
Dave
Sony A7RII, A900, A99 x2, A77II, A580, A200, ZA 135 1.8,tam 28-75 2.8, sig 35 art Tokina 11-16mm, Sigma 70-200 2.8 HSM OS, sony 16-50 2.8 ssm http://www.cornwall-wedding-photographer.co.uk
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Post Options Post Options   Quote Dave18 Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 08:24
Have found all of the post now will get some epoxy glue and give it a go the A850 has done around 120 weddings so I've had my moneys worth but it has never caused a problem before and has plenty of life left in it
Dave
Sony A7RII, A900, A99 x2, A77II, A580, A200, ZA 135 1.8,tam 28-75 2.8, sig 35 art Tokina 11-16mm, Sigma 70-200 2.8 HSM OS, sony 16-50 2.8 ssm http://www.cornwall-wedding-photographer.co.uk
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Post Options Post Options   Quote IanL Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 08:25
Wait a little while, until the a99II arrives. Then get either a99II, or the a99 at a lower price.
Ian
 



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Dave18 View Drop Down
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Post Options Post Options   Quote Dave18 Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 09:06
That was my plan but if I can't repair the 850 I may need to move faster
Sony A7RII, A900, A99 x2, A77II, A580, A200, ZA 135 1.8,tam 28-75 2.8, sig 35 art Tokina 11-16mm, Sigma 70-200 2.8 HSM OS, sony 16-50 2.8 ssm http://www.cornwall-wedding-photographer.co.uk
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Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 09:44
Might be worth contacting the Milton Keynes repair place for a quote...
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Dave18 View Drop Down
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Post Options Post Options   Quote Dave18 Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 12:46
ok I've scraped off the old epoxy resin with a stanley blade and applied new epoxy to the same place my guess is the AF is dependant on getting the thickness correct then I held it in place for 3 mins now I'm going to wait for a few hours before giving it a try out.
I just hope it works as the A850 has been so reliable 120 weddings used in all conditions, on the beach, in the Cornish mist, even did a wedding in a Cavern, its usually coupled with my Zeiss 135 1.8 and can produce the most amazing results in the right lighting
Will keep you posted
Dave
Sony A7RII, A900, A99 x2, A77II, A580, A200, ZA 135 1.8,tam 28-75 2.8, sig 35 art Tokina 11-16mm, Sigma 70-200 2.8 HSM OS, sony 16-50 2.8 ssm http://www.cornwall-wedding-photographer.co.uk
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Post Options Post Options   Quote Dave18 Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 15:36
Looks like it has all gone well AF is perfect
Sony A7RII, A900, A99 x2, A77II, A580, A200, ZA 135 1.8,tam 28-75 2.8, sig 35 art Tokina 11-16mm, Sigma 70-200 2.8 HSM OS, sony 16-50 2.8 ssm http://www.cornwall-wedding-photographer.co.uk
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Post Options Post Options   Quote Basil Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 21:50
Congratulations! The A850 is a wonderful camera. It's nice that you weren't afraid to have a go at fixing it yourself.
To see is to enjoy. To see beyond is to rejoice.

A77Mark II; A6600; A99; various film bodies and an ever-changing collection of lenses
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Post Options Post Options   Quote mirthseeker Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2015 at 23:44
Good to see that AF is perfect. As noted in the DPR thread I linked to earlier, and other threads mentioned in that thread, some only scrape part of the adhesive from the mirror, so that the remaining old adhesive enssures the mirror is accurately placed, others just removed all the adhesive. Seems removing all the adhesive worked ok for you.
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Dave18 View Drop Down
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Post Options Post Options   Quote Dave18 Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2015 at 06:08
Actually I only removed the adhesive from the mirror I didn't remove the adhesive from the body because I was worried it might get onto the sensor
Dave
Sony A7RII, A900, A99 x2, A77II, A580, A200, ZA 135 1.8,tam 28-75 2.8, sig 35 art Tokina 11-16mm, Sigma 70-200 2.8 HSM OS, sony 16-50 2.8 ssm http://www.cornwall-wedding-photographer.co.uk
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Post Options Post Options   Quote Dave18 Quote  Post ReplyReply Direct Link To This Post Posted: 28 June 2015 at 10:54
Unfortunately 50 shots into my wedding yesterday the mirror became detached so I have decided to get it repaired professionally. In the meantime I bought an A99 did a wedding with it yesterday coupled with the Zeiss 135 1.8 totally awesome only downside is it mows through batteries
Sony A7RII, A900, A99 x2, A77II, A580, A200, ZA 135 1.8,tam 28-75 2.8, sig 35 art Tokina 11-16mm, Sigma 70-200 2.8 HSM OS, sony 16-50 2.8 ssm http://www.cornwall-wedding-photographer.co.uk
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