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03-20-2013, 07:24 PM   #1
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Question about the light meter of the Cosina CT-1A (or it's many clones)

Hi, I just got a Cosina CT-1A (in my case a Petri GX-1). I belive it's the most cloned K-mount camera ever. It manifests as the Petri GX-1, Miranda MS-1, Hanimex DR-1 and many, many others. It's also the backbone of the Nikon FM10, OM2000 and the Ricoh SLRs look suspiciously similar too. Even looks quite like my Pentax P30.

Borrowed image here



On my copy, I will need to half-press the shutter button to turn on the meter and when I release the button the meter turns off immediately. Is it supposed to behave like that or it's just my copy? It's impossible to meter by changing shutter speeds because my left hand fingers would need to half depress the lever to keep the meter on. That is so irritating!

I also have a small issue with the shutter lock, because the film advance lever must be extended to allow operation, but that can be solved with some mods.

Niggles aside, it's a really nice camera. The mechanisms are surprisingly smooth, although a little loud and crude in the acoustics. Beneath the plastic shell, there's a really solid, dead simple design.

If you have used this camera. please advise on the meter issue.

Regards,

03-20-2013, 08:06 PM   #2
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QuoteOriginally posted by weijen Quote
On my copy, I will need to half-press the shutter button to turn on the meter and when I release the button the meter turns off immediately. Is it supposed to behave like that or it's just my copy?
This behavior is not atypical for this class of camera. Have you tried backing off the wind lever to its ready position first?


Steve
03-20-2013, 08:14 PM   #3
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That's the same as my old Canon T60. What I liked about that camera was the incredible light weight.

The meter would stay on for about 10 seconds, from memory.
Maybe replace the battery?

Mine seized up after exposing it to too much sea air. That's what made me get the K10d instead of a canon rebel - the weather sealing.
03-20-2013, 11:27 PM   #4
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QuoteOriginally posted by calsan Quote
That's the same as my old Canon T60. What I liked about that camera was the incredible light weight.

The meter would stay on for about 10 seconds, from memory.
Maybe replace the battery?

Mine seized up after exposing it to too much sea air. That's what made me get the K10d instead of a canon rebel - the weather sealing.
Yep, would like to change the batteries first. If all fails, I'll try to mod it so the meter would be swithced on by backing off the lever a la Nikon FM style.

At the same time painting it pink..

03-24-2013, 06:44 AM   #5
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Update. I've found some youtube videos:

Miranda MS-1


Cosina CT-1A


Apparently the meter ONLY turns on when the shutter is half pressed!

Case closed

By the way, does anyone understand what the guy in the Miranda vidoe is saying? At about 5 minutes, he turn the shutter speed to 1s but the shutter remained longer much longer than that.
04-01-2017, 08:48 PM   #6
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QuoteOriginally posted by calsan Quote
That's the same as my old Canon T60. What I liked about that camera was the incredible light weight.

The meter would stay on for about 10 seconds, from memory.
Maybe replace the battery?

Mine seized up after exposing it to too much sea air. That's what made me get the K10d instead of a canon rebel - the weather sealing.
I was surprised that mine had been in storage for a couple of years, in a camera bag, but had a tiny bit of corrosion on the battery cover that was preventing the meter from working at all. It wasn't really visible until you held it up to the light at the right angle. A gentle scraping-off restored the connection to the fresh batteries & away I went. But I'm putting some tape over the battery cover to prevent that slow corrosion forming again - you're right about the weather sealing. And a non-functioning meter may be simply a product of a few nanometers of 'rust.' BTW, the CT1G (mine) is only on as long as the shutter is half-depressed, has been that way since day dot.
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