OPTEKA lenses for Sony Alpha

diving dicky

diving dicky

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Adam
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Can any body give me a hint as to why my Alpha 300 displays "no lens attached, shutter is locked" when I fit an Opteka Reflex Mirror Lens. My better half is a fan of e-bay and bought me the lens for my birthday (yesterday). The lens itself looks good quality although admitedly being new to photography I don't really know how to rate it anyway. Any advice welcomed, thanks.:help::thumbs:
 
Would I be right in assuming the lens doesn't have any electronic contact with the camera?

That would possibly explain why the camera doesn't know it's fitted, but I could be wrong....
 
You're right, the lens doesn't have any 'contacts' so what you're saying is probably correct. I am an electrical engineer so that was the first thing I thought although the Opteka website clearly states that the lens is suitable for all Sony Alpha cameras. They have supplied a T mount adaptor and the lens clicks into position fine. Is there anything I have to do to the settings on the camera, other than switch it to MANUAL FOCUS - this doesn't make any difference by the way.
 
HA HA - at last that works, thanks. I told you I was new to all this didn't I. Does you or does anybody else know about these Opteka lenses? As I said, the website looks professional enough but are they the optical equivalent of a Skoda 20 years ago? (no offence to Skoda fanatics!). I have of course heard of Tamron and the likes, but have never heard of Opteka. On a couple of occasions the misses has bought me electronic equipment from all over the world from e-bay which has turned out to be a cheap version of a copy of Alba or Bush - I suppose she has the best intention really.:thumbs:
 
What Opteka lens is it? I am guessing its something like 500mm-1000mm F8 ish. They are not the best quality, and very slow.
 
It's a 500mm F8, yes. I won't show the misses the bit about it being not the best quality, ha ha. I suspected so but didn't like to tell her - I do still like sex. What do you mean when you say the lens is slow?
 
I would guess he means the AF is slow :) I personally have a pretty slow lens (Tamron 18-200) and a really fast lens (Minolta 28mm Prime) and to be honest for normal shooting the AF speed doesn't make a huge amount of difference.
 
Slow in the sense of slow AF- and also slow because of the F8 won't let that much light in. Having said that, its the cheapest 500mm your going to get by a long long way. Have been tempted in the past- but wouldn't use it that often.
 
It will be very slow to af, mainly because it's physically impossible for the lens to do so without any electronic connection to the camera :naughty:
 
Thanks for everyones help so far. I guess the slowness (is that a word?) of the lens irrelavent anyway as I seem to only be able to use it in Manual Focus anyway. Next time I shall ask for socks and sneek out and buy a lens myself !! ha ha.:D
 
there is only afaik 1 autofocus reflex lens for any SLR/DSLR & that's the Minolta/Sony 500 AF Reflex. It's also optically 1 of the best mirror lenses going.
 
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