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Maxxum 9000 Focusing Deep

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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 Topic: Maxxum 9000 Focusing Deep
    Posted: 18 December 2021 at 14:45
[QUOTE=SamBurton] So I invested in a roll and shot and developed it. I am stumped. Ive got no idea why nothing that I focused on is in focus. I got one pic in focus but the rest are pretty far out. I tried 2 different lenses. This was at like 5pm so it was a little dark but you can tell what the camera was focused on. I can promise that all of the shots were sharp in the viewfinder by alot.

Album:https://imgur.com/a/oYByjFe

Focused on subject, Focus ended up on car behind him
[/QUOTE]

You say these were sharp in the viewfinder , but you don't state if they were taken with autofocus or manual focus ?

You also haven't said if the viewfinders dioptre is set correctly ?

If you've adjusted it did you set it with the lens off or on ?

see my photostream on flickr;
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pegelli View Drop Down
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 04 December 2021 at 08:35
I'm sorry, I have no idea what can cause this.

However I did make all the links work so the photo's show, you can't link to a page where the photo shows, you need to link to the actual file, starting with https:// and ending with .jpg

Just click 'quote' or 'edit post' to see how the correct syntax now looks.

Good luck with solving your problem, looking at the pictures there is definitely something really wrong, no doubt about that.
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Post Options Post Options   Quote SamBurton Quote  Post ReplyReply Direct Link To This Post Posted: 04 December 2021 at 06:52
So I invested in a roll and shot and developed it. I am stumped. Ive got no idea why nothing that I focused on is in focus. I got one pic in focus but the rest are pretty far out. I tried 2 different lenses. This was at like 5pm so it was a little dark but you can tell what the camera was focused on. I can promise that all of the shots were sharp in the viewfinder by alot.

Album:https://imgur.com/a/oYByjFe

Focused on subject, Focus ended up on car behind him

Focused on him in this pic. Came out super blurry

was focused on the back quarter of the car

was focused o the nov

the reason I love this minolta and want it to work

was focused on the subject

The only photo that came out OK. Was the second frame in the roll. The first roll I shot also the second frame was perfect as well. I think it was just up to chance that it happened.


Let me know if this gets anybody a better idea of what is wrong with the camera.

Edited by pegelli - 04 December 2021 at 08:31
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Phil Wood View Drop Down
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Post Options Post Options   Quote Phil Wood Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 21:11
Originally posted by SamBurton SamBurton wrote:

Update, I got out my digital caliper and measured my known working 7000 from the flange to the pressure plate on the back. It came out as 44.45mm. After, I did the 9000 and it was 44.52mm. So it is not as far out at I thought it was.


The flange distance of the A-mount is 44.50mm - your 9000 seems better than the 7000.

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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 21:06
The flange distance of A-mount is supposed to be 44.5mm - it seems both cameras are within spec.

Dioptre is a good point. And maybe now with the changed focus screen, the 9000 might be fine. I guess you have to invest in a roll of film.
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glefebvre View Drop Down
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Post Options Post Options   Quote glefebvre Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 20:48
The 9000 has a diopter adjustment. Make sure that it is set for your eye.

Edited by glefebvre - 03 December 2021 at 22:38
a99m2 a7r a900 a77m2 a700 7D A2 9 7 7xi 9000 XK X700x4 XE-7x2 XD-11 M645 Pro TLx2 & a boat load of lenses.
 



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SamBurton View Drop Down
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Post Options Post Options   Quote SamBurton Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 19:09
I am exclusively using the MF on the camera. Not really a fan of old Minolta autofocus and 99.9%% of the time I'm faster and more accurate.

Update, I got out my digital caliper and measured my known working 7000 from the flange to the pressure plate on the back. It came out as 44.45mm. After, I did the 9000 and it was 44.52mm. So it is not as far out at I thought it was. I then took a know working lens and focused on a tripod with the 7000 at my computer screen. Taped the focus so it couldn't move. Switched the camera out and put the lens on it and it seems like the focus was the same, at most maybe a tiny tiny bit out. The photos I took from it though are so far out.

I also have a junk 9000 sitting around so I took the focusing screen out of it and swapped it in the better camera.

I also switched the back from the junk cam because it seemed to have a little more pressure but the old one was fine tbh.

If there any ideas on why the end photos would be so far out of focus, Send suggestions. Im stumped and all of my knowledge of cameras I feel is pretty used up. I might end up having to shoot a roll of film and do a true camera test to figure out how far out and what is wrong.

Thanks for the advice and ideas so far,
Sam
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Bob J View Drop Down
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Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 15:29
If the problem is with MF, then it is probably down to the focus screen being misaligned.
If the AF is out, you are not missing much. I really liked my 9000AF, but tended to just use it on manual focus as to describe the speed as pedestrian would raise expectations a bit more than they should be - maybe somewhere between pedestrian and glacial....
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Phil Wood View Drop Down
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Post Options Post Options   Quote Phil Wood Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 11:47
If you are manually focusing and the pictures are off then the AF sensor accuracy is irrelevent. It must be a misalignment of the film (dodgy back/pressure plate etc) or the viewfinder/screen - screen inverted (ie you are focusing on the wrong face) is worth checking. I would be hoping that it is the screen - an easy fix.
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 09:17
If you can manual focus , and the pictures come out fine , then the focus screen is in correctly rather than being upside down .

The AF unit being out of whack would also cause focus issues , but it's the 1mm registration distance you mention that's the bit that's odd .

Check the back while it's open .
see my photostream on flickr;
http://www.flickr.com/photos/neilt3/
C & C welcome.
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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: 03 December 2021 at 09:00
Even with shims between the body and mount , there isn't enough used for it to be 1mm out .
Just a few thou .
Is the pressure plate on the back missing ?
That would account for that difference .
see my photostream on flickr;
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C & C welcome.
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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 08:52
The focus screen might be off. I think the 9000 has interchangeable screens - take it out and reset it.

Had the same recently with my Bronica SQ.

Edit: you probably know this site, but if not, this is an Minolta 9000 site: 9000.org



Edited by addy landzaat - 03 December 2021 at 08:55
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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 08:49
What Phil said

If you use a prime, the lens will have a distance scale to check the distance.
When they do not differ between the two cameras (and the other camera is correct) it seems it focusses fine. That and your experience with the viewfinder rules out the AF-sensor and the flange distance.

BTW if the flange distance is off, the camera still has to focus correctly, just the close focus will be longer or it will not reach infinity focus.

So, I agree with Phil it most likely is the film. How is the pressure plate of the camera?

Checking issues is always a pain, not just with film cameras

And welcome to Dyxum, Sam
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Post Options Post Options   Quote SamBurton Quote  Post ReplyReply Direct Link To This Post Posted: 03 December 2021 at 08:37
The camera is new to me. The back seems to be on properly but I guess I'm not 100% sure

I only ever manually focus the lens. The AF is just not good for me and I literally pull focus for a living so it is second nature.

The lens is 100% confirmed fine. I've used it for over 40 rolls of film on my 7000 body.

What interesting is the focus didn't look off in the viewfinder. Even if I lock focus and switch camera to make sure it is the same. So the VF has nothing to do with it. It is the same across my 7000/9000.

Is there a way to adjust the back spacing? Like I would on a cinema cam? Maybe a way to align the mirror and the sensor plane?.
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