Reverse reversing ring?
I have a reversing ring for a 49mm thread 50mm lens. What I want is the opposite. Instead of the ring being positive K bayonet to positive 49mm thread I want it to be K bayonet female to 49mm female so that I can put it on the end of my reversed lens and fit my Pentax 080 ring flash onto the front. Any ideas anyone on how to fit a 080 ring flash onto the end of a reversed 50mm K fit lens?. CHEERS Vic.
If you have an old 49mm filter and a cheap extension tube set (just for the parts!) you could try this link I put this together in an hour or so and it works just like the real pentax item!
Hang on a minute mayday. You copied my idea and even posted in my thread, so why not link to my thread on this forum instead of PentaxForums? Your version differs from mine only in the fact that it locks on to the reverse mounted lens. This is a function of the chosen donor extension tube, not the overall design. My mark II version would use a suitable extension tube rather than one that fell to pieces once I'd started dismantling it.
You could at least have the courtesy to acknowledge my thread here, though I appreciate the acknowledgement on the other forum.
I have a reversing ring for a 49mm thread 50mm lens. What I want is the opposite. Instead of the ring being positive K bayonet to positive 49mm thread I want it to be K bayonet female to 49mm female so that I can put it on the end of my reversed lens and fit my Pentax 080 ring flash onto the front. Any ideas anyone on how to fit a 080 ring flash onto the end of a reversed 50mm K fit lens?. CHEERS Vic.
If you have an old 49mm filter and a cheap extension tube set (just for the parts!) you could try this link I put this together in an hour or so and it works just like the real pentax item!
Hang on a minute mayday. You copied my idea and even posted in my thread, so why not link to my thread on this forum instead of PentaxForums? You could at least have the courtesy to acknowledge my thread here, though I appreciate the acknowledgement on the other forum.
Hi Pete - my apologies for the oversight - just came in from work and was scanning the forum when I saw the post and thought I know a good way to solve the problem and dashed off a response. Just come back from dinner and posted this. I knew there was a thread on this forum but just couldn't find it readily. Apologies once again
David
Retired at last - now all that time for photography - you would think: wink:
If Carlsberg made reversed reversing ring adapters to fit ring flash lights to reversed lenses, they'd probably do a half decent job. Until then . . .
http://cgi.ebay.co.uk/3-ring-Macro-Extension-Tube-Pentax-K100D-K10D-K200D-/22068...
Under £5.
They basically have a short PK connector at each end with screw thread connectors in between. If you're only after one pair of connectors they should make a reasonable solution.
I was hoping to use a Nikon set & a PK set to make up a macro lens adapter but unfortunately the screw threads for the two sets differ (even though I got them from the same supplier)
I'm sure I 'll find other uses for the PK set I got, the nikon ones will probably end up back on e-bay sometime.
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
CHEERS Vic.
I've just had a thought. When putting an extension tube and a filter ring together why take the filter glass out of its ring? As we use filters on our lenses (most of us) why not leave the filter glass in situ? Looking at various cheap sets of extension tubes am I right in thinking that they have an adaptor ring with the male bayonet and a female thread. Which means the actual tubes have a male thread which needs to be removed first before the filter ring can be glued to it?
CHEERS Vic.
That's exactly it Vic. Take the shortest extension tube, remove the lens mount half and then glue the filter ring into the space left. I used a glue designed for sticking metal.
As for removing the glass - well I suppose there is the option to leave it in. But certainly remove it whilst the gluing process is going on - save messing up the glass. I still have the remaining two bits of the cheap tubes I bought to do the job. Will have a look this evening and see whether the second "middle tube" of the set would convert to a flash mount. If so - might be able to put one together for you if interested :
David
Retired at last - now all that time for photography - you would think: wink:
Pentax K-1 + K-5 and some other stuff
Algi
Tony
I am now on Flickr which is nice !
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652 posts
16 years
Weston-super-Mare UK
I have a reversing ring for a 49mm thread 50mm lens. What I want is the opposite. Instead of the ring being positive K bayonet to positive 49mm thread I want it to be K bayonet female to 49mm female so that I can put it on the end of my reversed lens and fit my Pentax 080 ring flash onto the front. Any ideas anyone on how to fit a 080 ring flash onto the end of a reversed 50mm K fit lens?. CHEERS Vic.
If you have an old 49mm filter and a cheap extension tube set (just for the parts!) you could try this link I put this together in an hour or so and it works just like the real pentax item!
David
Retired at last - now all that time for photography - you would think: wink: