Canon Eos 10 test shots

Learnings from testing an old camera with expired film stock

Earlier in November 2025 i repaired a Canon Eos 10 camera from the 1990s and then took it out to test it with a roll of Kodak 400 asa film. You can find the repair here: Canon EOS 10

Canon EOS 10

The caveat is that the film expired in 2005, 20 years ago. As a result I have overexposed it at 200 asa to compensate for the deterioration in sensitivity from such a long storage period. It may work, it may not, previous tests on a 200 asa film showed that a one stop over exposure was quite sufficient. Fingers crossed 🤞 on this one.

I don’t expect anything much, I expect quite a bit of grain and a definite colour hue over the entire roll. Who knows there may be nothing on it at all 🤷‍♂️

I’ve sent the roll off to our local photo guys in Leicester : Classic Photo Supplies and hopefully something will be on the medium res scans that i have requested. If there are pictures below, then there was some success, if not, enjoy the blackness.

Well, the scans are back and to be quite honest this one is a bit of a disaster. As stated the film is over 20 years out of date and there appears to be two problems here. Underexposure is one issue, I over exposed this by one stop but I don’t even think that is enough. If I’d overexposed at 2 stops though I might have improved the brightness, the already heavy grain would have been even more exaggerated. I think it’s fair to say this 400 asa old film stock I have is passed its time and not really fit for use.

Look at the grain at plus one stop overexposure
Hello what’s that line?
Heavy grain and a magenta cast
That shutter sync problem
Slower speed, shutter ok

So. Though the results were not good and I have now realised that this old stock film is probably best for me to use as test film only. There is heavy grain, a distinct cast over the film and a quite obvious shutter curtains sync issue. These frames above a shutter speed of 500 seem to be the issue, and that is where the shutter speed has not synced the curtain, it’s definitely running slow. The film has been beneficial in identifying an issue in this part of the camera. I will now do a CLA on this camera shutter assembly to try to remedy this issue. I wasn’t using flash here, it was a dull cold English Sunday afternoon.

This is an old camera that has been sitting idle for many years, it may sort itself out after a few more rolls of film, however I can do something about it now. And this is really a lesson to be learned for anyone buying old film cameras, they do need that little bit of tender loving care to get them back into a good working condition.

I’m pleased I’ve highlighted this issue, I will get the work done to improve the shutter sync and then run another roll of film through it.

Maybe now is the time to buy a shutter speed optical tester. That may save me a bit of expense on processing costs and will also allow me to make these checks before committing to film.

Canon EOS 10

An old EOS 10 was in need of attention. And I was able to lend a helping hand

Here I have a Canon EOS 10, a quite superb little camera. The date code within the film barrel is HE1213, indicating that this camera was manufactured in December 1990. At the time of manufacture this camera sat firmly at the top of Canons camera tree only surpassed by the EOS1 professional camera that had been released the year earlier in 1989.

My EOS 10 35mm SLR

This camera was amongst a selection of cameras and equipment passed on to me by a good friend and professional photographer as can be seen here: Cameras…i need more!

Here is a little history regarding the EOS 10

The Canon EOS 10 is an autofocus 35mm SLR introduced in 1990. The model name was EOS 10S in the Americas, and EOS 10QD in Japan. There was a commemorative metallic-silver version introduced in 1991 to mark Canon’s 60 millionth 35mm camera sold.

The improvements over the original EOS cameras are a newly improved autofocus sensor. Focus modes include One-Shot AF for non moving subjects and AI Servo AF for moving subjects. It is able to detect and switch automatically between the autofocus modes. Shutter ranges from 30 sec. to 1/4000 sec., with B. X-sync at 1/125 sec. Similar to the EOS 750, is has a built-in flash with a guide number 12 (at ISO 100). It uses one 2CR5 lithium battery and weighs approx 625g for the body without battery.

Camera wiki.org

Assessment:

One of the nuances introduced on this camera was the barcode option. Introduced at a time where barcodes were starting to creep into our life, in a knock at Minolta and their use of specific expansion cards for specific scene settings, Canon thought it would be good to utilise barcodes that you could scan, to automatically set your camera with these options without expansion cards. Needless to say it didn’t take off and was soon dropped from later camera production. It was a sign that the development teams were looking for advancement opportunities.

That barcode mode – soon forgotten

These cameras are available at fairly reasonable prices now partly due to the dreaded sticky rubber grip issue that tends to send buyers running for the hills, god knows why, it’s an easily remedied issue that just takes a little time and patience. I did a previous post about cleaning these cameras here: Sticky, Rubber camera grips it’s all down to the polymers in the Vulcanised rubber breaking down and reacting with hand sweat and other stuff. Have a read, and never throw away a camera just because it’s sticky.

This camera has some stickiness but it is not an advanced case. It will still be cleaned in the same manner, to prevent it developing any further.

The camera is just a bit dusty and in need of a good clean. The mirror is dusty and needs cleaning, a blow out of the interior should suffice as the shutter blades are opening and closing with no issue.

The battery is a lithium 2CR5 cell. The battery chamber is clean with no signs of battery contamination, this is a very good sign. When placed into the camera the screen comes on, is clear with no damage. A lens put on the front confirms that auto focus can be achieved and the camera fires and winds as expected.

To be quite honest, there doesn’t seem to be a lot wrong with the camera. It really seems to be just a clean and maintenance issue. I’m going to give the camera a thorough look over, dust and clean, a thorough clean of the external rubber and finish it all of with a good exterior body treatment. I will then run a roll of used film through to check the DX reader is working, as well as the transport system. Fingers crossed nothing major raises its head during the repair process.

Repair:

Straight in and at the cleaning, and to be honest the rubber wasn’t too bad. I only used two applications and not a lot of dirt came off on either. After it has dried, it does feel a great deal better.

Heavy cleaning, wasn’t that heavy

The mirror has cleaned up nicely, so has the prism above it, however whilst in there I noticed that the mirror damper felt was failing, so this I have now removed and will have to replace prior to using as I don’t want to cause any further damage.

The missing damper felt area, highlighted in red

I’ve had to order some new material that will hopefully be here shortly, as my supply, as is always the problem lately, is in storage with all my other gear pending this house move that will probably never occur. it’s a real pain in the butt not being able to access your most required kit. Hey ho.

The light seal has arrived, and so I start by getting the damper felt put in place. First I cut it to size, remove the sticky back paper and just wipe the sticky bit with some water, this allows me a little more time to reposition it before the adhesive does its work.

Below is a very small video with me putting the camera into manual mode on a single exposure setting to test the actual worth of the damper foam.

All working fine

I’m happy with what has been done so far.

Strap cleaned and restored

I’ve even given the neck strap a good buff up, the rubber on it was almost white rather than black, a bit of a clean and a polish and it’s now been restored to it’s original glory.

With the new damper in place it’s now time to run a film through it, I have an old test film I use for this purpose, I’m going to set the camera to its highest shutter setting and just run the whole roll through in quick succession to check the transport and rewind.

And here is that test, it went super fine and the full roll rewound at the end.

Transport works just fine

I’ve tested all settings, shutter speeds and functions including the flash and all is as it should be. I’m happy to say that this camera appears to be in full working order.

Now for the final clean and presentation.

Result:

Well, a little bit of car cockpit cleaner has done wonders. It looks beautiful and has a nice aromatic smell as well. I know I’m biased when it comes to cameras but I think this is an absolute beauty.

All polished and looking fine

I’m really pleased with this camera, I’m heading out later today to watch a relative play football and I’m going to take this along to grab some snaps with an expired film from 20 years ago. It will be a good final test of the capabilities of this camera, and should finalise its renovation. It’s been a great camera to work on and is yet another worthy addition to my collection. I will post the photos here when they are finalised. Canon Eos 10 test shots

Thank you all for passing by, it’s always most appreciated.