Problem with this item teleconverter
Posted 11/12/2013 - 14:37
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Sounds like a contactor problem.
1 Clean contacts both ends of Convertor, camera and lens.
If that does not solve the problem, try using the convertor in combination with another lens. If that works then there is a contact problem between the convertor and 50mm lens, if not then the problem is likely with the convertor.
Regards Steve
1 Clean contacts both ends of Convertor, camera and lens.
If that does not solve the problem, try using the convertor in combination with another lens. If that works then there is a contact problem between the convertor and 50mm lens, if not then the problem is likely with the convertor.
Regards Steve
Posted 11/12/2013 - 14:54
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It's probably not getting an earth return. If you scrape of some of the black anodising as in the picture below it should make it work.
John K
Posted 11/12/2013 - 15:04
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This is the lens I am using and it doesn't have the crescent of electrical contacts on it. But it does work automatically apart from focusing.
Posted 11/12/2013 - 15:33
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Check how that contact at about 120 degrees round from the top lines up and see if it corresponds to the section on my converter that I scraped off.
John K
Posted 11/12/2013 - 15:34
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@daydream jay
the photo before yours is of the teleconverter rather than the actual lens
the photo before yours is of the teleconverter rather than the actual lens
David
Posted 11/12/2013 - 16:06
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Yes, the bottom of the converter, not the lens! (My converter would appear to be the same make/model as yours.)
John K
Posted 11/12/2013 - 18:10
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That's the same single contact that I have on my 50mm f1.7 so no reason why it shouldn't work. I've just tested the combo on my 5iis and it's fine. Looks like a good clean of the contacts is in order.
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"Life is what happens to you while you're busy making other plans" (John Lennon)
"Life is what happens to you while you're busy making other plans" (John Lennon)
Posted 11/12/2013 - 21:40
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SteveEveritt wrote:
That's the same single contact that I have on my 50mm f1.7 so no reason why it shouldn't work. I've just tested the combo on my 5iis and it's fine. Looks like a good clean of the contacts is in order.
It isn't the lens that has the problem (if you read OP's original post he states the lens normally works OK without the TC) it is the converter itself.
That's the same single contact that I have on my 50mm f1.7 so no reason why it shouldn't work. I've just tested the combo on my 5iis and it's fine. Looks like a good clean of the contacts is in order.
John K
Posted 12/12/2013 - 11:27
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I have cleaned the contacts and still nothing.
The F on the LCD display on my camera just has - - next to it.
I tried it with my 50mm FA 1.4 lens too with the same result.
The F on the LCD display on my camera just has - - next to it.
I tried it with my 50mm FA 1.4 lens too with the same result.
Posted 12/12/2013 - 12:44 - Helpful Comment
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It seems to be a similar porblem to several 'PKA' extension tubes where the earth return is not being made.
Looking at the e-bay link it looks like the bottom of the TC is anodised so scratching the base of the TC as per JAK's photo should do the trick.
If this doesn't work it might be that there isn't a return conection between the ends of the TC or that one of the other contacts/wire has broken. Try checking each in turn with a multimeter. There should be very little resistance (no more than a few ohms) between coresponding contacts on front & back faces. My money's on the scratching.
The lens itself doesn't have the cresent of contacts but does have the only one used for a 50mm. Many lenses only have a few of the contacts, which ones varies based on the focal length.
Looking at the e-bay link it looks like the bottom of the TC is anodised so scratching the base of the TC as per JAK's photo should do the trick.
If this doesn't work it might be that there isn't a return conection between the ends of the TC or that one of the other contacts/wire has broken. Try checking each in turn with a multimeter. There should be very little resistance (no more than a few ohms) between coresponding contacts on front & back faces. My money's on the scratching.
The lens itself doesn't have the cresent of contacts but does have the only one used for a 50mm. Many lenses only have a few of the contacts, which ones varies based on the focal length.
Mike
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Pentax:K5ii, K7, K100D, DA18-55, DA10-17, DA55-300, DA50-200, F100-300, F50, DA35 AL, 4* M50, 2* M135, Helicoid extension, Tak 300 f4 (& 6 film bodies)
3rd Party: Bigmos (Sigma 150-500mm OS HSM),2* 28mm, 100mm macro, 28-200 zoom, 35-80 zoom, 80-200 zoom, 80-210 zoom, 300mm M42, 600 mirror, 1000-4000 scope, 50mm M42, enlarger lenses, Sony & micro 4/3 cameras with various PK mounts, Zenit E...
Far to many tele-converters, adapters, project parts & extension tubes etc.
.[size=11:].Flickr• WPF• Panoramio
.
Pentax:K5ii, K7, K100D, DA18-55, DA10-17, DA55-300, DA50-200, F100-300, F50, DA35 AL, 4* M50, 2* M135, Helicoid extension, Tak 300 f4 (& 6 film bodies)
3rd Party: Bigmos (Sigma 150-500mm OS HSM),2* 28mm, 100mm macro, 28-200 zoom, 35-80 zoom, 80-200 zoom, 80-210 zoom, 300mm M42, 600 mirror, 1000-4000 scope, 50mm M42, enlarger lenses, Sony & micro 4/3 cameras with various PK mounts, Zenit E...
Far to many tele-converters, adapters, project parts & extension tubes etc.
.[size=11:].Flickr• WPF• Panoramio
Posted 12/12/2013 - 13:30
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Daydreamjay wrote:
I have cleaned the contacts and still nothing.
The F on the LCD display on my camera just has - - next to it.
I tried it with my 50mm FA 1.4 lens too with the same result.
Not sure how to say this differently. Yes you are correct, the lens isn't getting an electrical connection through the teleconverter. You have already stated that the lens works fine so cleaning those contacts won't help. But one of those contacts, the earth return is being blocked by the black paint on the converter. The ONLY solution is to do as suggested above, and yes, scraping that anodising off the converter allowed mine to connect and resolve the same problem you are experiencing.I have cleaned the contacts and still nothing.
The F on the LCD display on my camera just has - - next to it.
I tried it with my 50mm FA 1.4 lens too with the same result.
If you try an internet search you will find others who have provided this solution in the past and why I made this drastic (not really) modification to mine.
Why did you ignore the suggested solution given yesterday?
John K
Posted 12/12/2013 - 13:44
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Crikey it's like being told off by my teacher John haha.
The reason I didn't want to start scratching stuff off is because then I wouldn't be able to send it back should that method not work...
I hope this is an acceptable reason John...
The reason I didn't want to start scratching stuff off is because then I wouldn't be able to send it back should that method not work...
I hope this is an acceptable reason John...
Posted 12/12/2013 - 13:56
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I was just getting frustrated that you seemed to be ignoring this. I obtained mine in a package with a camera and some lenses so had nothing to loose. I too was sceptical but it worked. It is a Vivitar converter, the same model as yours.
The only other 'solution' would seem to be to return it for a refund. You did pay quite a bit for it so I can see your reluctance to doctor it. If you send it back I'm sure you'll find another one quite a bit cheaper. In fact I'll even consider selling my one if it helps and it won't cost anywhere near what you paid for that one.
The only other 'solution' would seem to be to return it for a refund. You did pay quite a bit for it so I can see your reluctance to doctor it. If you send it back I'm sure you'll find another one quite a bit cheaper. In fact I'll even consider selling my one if it helps and it won't cost anywhere near what you paid for that one.
John K
Posted 12/12/2013 - 14:13
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Yes, I now realise I paid a lot for it - I thought it was cheap at first!
Yesterday I ordered this one: http://www.oxfam.org.uk/shop/product/vivitar-automatic-teleconverter-2x-22-hd_10...
I'll see if it works any better and then return the other if it does.
First impression was that it wasn't dead sharp, the photo below shows that it's a little soft or am I being unrealistic expecting it to be any sharper?
Yesterday I ordered this one: http://www.oxfam.org.uk/shop/product/vivitar-automatic-teleconverter-2x-22-hd_10...
I'll see if it works any better and then return the other if it does.
First impression was that it wasn't dead sharp, the photo below shows that it's a little soft or am I being unrealistic expecting it to be any sharper?
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This was the item I bought: http://www.ebay.co.uk/itm/200997721724?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1...