Pentax AF 140c ring flash

Studio Photography, Flash, Daylight and Studio Lights, Flash equipment and use
Reply to topicReply to topic
Go to page  1, 2  Next 

  
31 May '12 Thu May 31, 2012 20:08    
SteveEveritt
Founder Member +  Founder Member +
  •  

Post Pentax AF 140c ring flash

Hi folks, picked one of these up on eBay, arrived today but no manual with it. Can someone please remind me of that fabulous website that has a whole heap of manuals and hopefully one for this flash? Failing that, if anyone has one they either don't want or could copy and email to me that would be fab.
Cheers
Steve

 
 
 
 
  
31 May '12 Thu May 31, 2012 20:28    
Charlotte
Founder Member +  Founder Member +
  •  

Post Re: Pentax AF 140c ring flash

Hopefully this is the one Steve,

c758710.r10.cf2.rackcd...manual.pdf

 
 
 
 
  
31 May '12 Thu May 31, 2012 20:54    
cardiff_gareth
Founder Member  
  •  

Post Re: Pentax AF 140c ring flash

- Charlotte

Hopefully this is the one Steve,

c758710.r10.cf2.rackcd...manual.pdf


Excellent !!

Superb Charlotte Cool


_________________

Gareth

My outfit: K5ii gripped - Pentax DA* 16-50mm - Sigma 105mm - Sigma 170-500mm - Pentax F 50mm f1.7 - Sigma 10-20mm f3.5 - Metz 48 AF1

My Flickr

My PPG images

500px

 
 
 
 
  
31 May '12 Thu May 31, 2012 21:02    
SteveEveritt
Founder Member +  Founder Member +
  •  

Post Re: Pentax AF 140c ring flash

Thank you Charlotte, perfect.


_________________

My flickr Photostream

 
 
 
 
  
2 Jun '12 Sat Jun 02, 2012 11:06    
SteveEveritt
Founder Member +  Founder Member +
  •  

Post Re: Pentax AF 140c ring flash

More assistance is thus required...sorry.
I received a 82 - 58mm reducer from eBay this morning specifically to use with my Sigma 180 macro (the old manual focus one) and when the ring flash is mounted it works perfectly.

Test shot no PP



Then I tried using some tubes to get more magnification but cold not stop massive over exposure. With the tubes I'm not having to get too close so that's not the reason.
Example shot



These are the tubes I'm using, they have all the contacts. Any ideas.

 
 
 
 
  
2 Jun '12 Sat Jun 02, 2012 11:57    
Charlotte
Founder Member +  Founder Member +
  •  

Post Re: Pentax AF 140c ring flash

Have you scraped a bit of paint off of the other end of the tube to make the seventh contact Steve?

I had to do that on my Jessops tubes - thanks to Mannesty's instructions on PUF.

Have you tried using them in Manual mode to see if it still over exposes ?


_________________

Je Suis Charlie

 
 
 
 
  
2 Jun '12 Sat Jun 02, 2012 15:05    
SteveEveritt
Founder Member +  Founder Member +
  •  

Post Re: Pentax AF 140c ring flash

Thanks Charlotte, could you post a link to the article please so I can see which end to scratch, and as for manual, I always shoot in manual both these shots were at the same setting i.e. 180mm (fixed) 180th f16 ISO100

 
 
 
 
  
2 Jun '12 Sat Jun 02, 2012 15:19    
Charlotte
Founder Member +  Founder Member +
  •  

Post Re: Pentax AF 140c ring flash

I can't find the original thread now but this one explains it as well.

www.pentaxuser.co.uk/f...#comm37167


_________________

Je Suis Charlie

 
 
 
 
  
2 Jun '12 Sat Jun 02, 2012 17:14    
SteveEveritt
Founder Member +  Founder Member +
  •  

Post Re: Pentax AF 140c ring flash

This seems to be talking about controlling the aperture from the camera with tubes attached, I don't have that problem its only when the flash is attached I get the over exposure problem. It's fine when I use a hot shoe flash and the on board flash too.


_________________

My flickr Photostream

 
 
 
 
  
2 Jun '12 Sat Jun 02, 2012 17:54    
Algernon
Sponsor  Sponsor
  •  

Post Re: Pentax AF 140c ring flash

Is the flash on manual?

Algi


_________________

Algi

 
 
 
 
  
2 Jun '12 Sat Jun 02, 2012 18:57    
SteveEveritt
Founder Member +  Founder Member +
  •  

Post Re: Pentax AF 140c ring flash

It doesn't seem to matter, if I put it on f5.6 or f22 or indeed manual I get the same results. works OK with the lens directly but as soon as I add any number of tubes, overexposed


_________________

My flickr Photostream

 
 
 
 
  
3 Jun '12 Sun Jun 03, 2012 18:12    
SteveEveritt
Founder Member +  Founder Member +
  •  

Post Re: Pentax AF 140c ring flash

I have given the trick a go and it made no difference however if I take off the 13mm tube everything works as I want, well on the 180mm but I can't quite get the correct exposure with my 50mm and tubes. Does anyone know of a diffuser for a ring flash?


_________________

My flickr Photostream

 
 
 
 
  
3 Jun '12 Sun Jun 03, 2012 18:30    
Algernon
Sponsor  Sponsor
  •  

Post Re: Pentax AF 140c ring flash

Sounds like the contacts on all your tubes isn't 100%

Try white hankies or tracing paper stuck on with masking tape as a diffuser, also
try some non macro shots at 1M, 3M,5M,7M etc. even OOF ones


Algi


_________________

Algi

 
 
 
 
  
20 Jul '12 Fri Jul 20, 2012 20:47    
bassman
Member / f8  Member / f8
  •  

Post Re: Pentax AF 140c ring flash

I broke the hot-shoe on my Sigma ring-flash removing it from the camera yesterday.
I phoned Sigma UK and they supplied me a new one for £15 [they wanted £40 labour to fit it].
I changed it in about 10 Min's it's a little bit fiddly you have to remove the bottom of the housing there are a few springs and things.
So if anyone breaks theirs don't try to glue it ,just give Sigma a ring.

 
 
 
 
  
20 Jul '12 Fri Jul 20, 2012 22:07    
mannesty
Founder Member  
  •  

Post Re: Pentax AF 140c ring flash

- Algernon

Sounds like the contacts on all your tubes isn't 100%

If all 7 contacts are not electrically continuous through all of the tubes in use, it is highly likely that your overexposure is due to the lens not stopping down, just as if it were a K or M series lens.

If your tubes have only 6 contacts, you need to 'create' the 7th one to match your camera/lens contact position.

This can usually be achieved, as Charlotte pointed out, by scraping paint/anodizing from the area where the 7th contact should be. That doesn't necessarily ensure a good electrical contact though. In most cases it should work, in some, it might not due to manufacturing tolerances of your tubes.

If you can somehow tighten them such that the male face of each tube makes good contact with the female face of the other two, you should be good to go.

If you try this paint scraping trick and you have a multi-meter handy, just check that there is electrical continuity between the female face of the tube (usually chrome) and the exposed part of the male end where you scraped the paint. Each tube, and each combination of tubes, needs to be electrically conductive all the way through from front face to rear face.

What camera are you using it with? Are you using the flash in manual?


_________________

Peter E Smith

My flickr Photostream

"Knowledge is knowing that a Tomato is a fruit. Wisdom is knowing not to use it in a fruit salad."

 
 
 
 
Link  QR 
Share this Printer Friendly Page  facebook   google+   linkedin   twitthis  
Show more ...
Go to page  1, 2  Next


Go to page  2  Next





pentaxslr Non-Human Visitor Terms and Conditions of Use