Closer Macro


richardmills

Link Posted 29/07/2010 - 22:39
How can i get closer than 1:1 with my DFA 100mm?

Ive read this great web page.
link

2:1 would do me for now.

Whats the difference between Bellows and extension tubes? Are bellows just like adjustable extension tubes?

dougf8

Link Posted 29/07/2010 - 22:46
Tubes, work.
Cheap tubes from ebay.

https://www.pentaxuser.com/forum/topic/entries-for-fortnightly-competition---46---health-21307#comm234195

Was done using a Sigma 105mm and Vivtar 36mm tube from ebay.
The 105mm does 1:1 and I don't know what it did with the tube.

Anyway, I was in M:manual mode using the green button for stop down exposure , manual focus.

Yes bellows are like an infinitely adjustable tube.

There's a thread for a flash light extender too somewhere.

More expensive tubes have electrical contacts which allow automatic exposure.
Lurking is shirking.!
Last Edited by dougf8 on 29/07/2010 - 22:51

Mannesty

Link Posted 29/07/2010 - 22:56
Use an extension tube, or several. They are usually sold in sets of 3.

Do your research carefully though. Not all tubes have the elctrical contacts and of those that do, many don't have the full compliment and a minot modification (paint scraping) might be necessary. Even fewer tubes on offer have the pass-through AF screw drive (not a problem for macro work).

If you want a macro focussing rail and variable extension, a bellows is the answer but you will not find one that has the electrical contacts.
Peter E Smith

My flickr Photostream
Last Edited by Mannesty on 29/07/2010 - 23:00

Smeggypants

Link Posted 29/07/2010 - 23:47
I've enough tubes to focus inside the lens
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283

Clarky

Link Posted 29/07/2010 - 23:52
Richard, you can also try reverse stacking of lenses for some super close shots.

Check this thread. link
Camera:|K-7|
Pentax Lenses:|DA12-24/f4 ED AL|DA35Ltd Macro|FA31Ltd|FA77Ltd|FA50/1.4|F70-210|FA20-35 f4/AL|A*200/f4 Macro ED|A50/1.7|A50 Macro f2.8|1.7xAF adapter|
Voigtlander|125/f2.5SL Macro APO Lanthar|
Sigma Lenses:|EX DG 100-300 f4|2X & 1.4X TC|
Flashes:|AF540FGZx2|RingFlash AF160FC|

dougf8

Link Posted 30/07/2010 - 01:15
Smeggypants wrote:
I've enough tubes to focus inside the lens

Or to see what you had for tea yesterday?
Lurking is shirking.!

Smeggypants

Link Posted 30/07/2010 - 01:25
hehe
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283

amilner

Link Posted 30/07/2010 - 09:43
To get 2:1 you would need 100mm of tubes with a 100mm 1:1 lens I think, so you would need two sets.

Another alternative is a 2xconverter.

Bellows will get you closer. Mine go to about 150mm. That actually gives me about 3:1 with a standard 50mm lens. They can be had quite cheaply on ebay.

Pentax also made a helical extension tube - which is a sort of mini bellows.

Reversing one lens on another is possible but fiddly - to get 1:2 you need to reverse a lens of half the focal lenth on the front - so a 50mm on a 100mm lens would do it. But if you have a 50mm all you need is a thread adaptor to link the two together.

Another possibility is simply reversing a wide angle lens on to the camera body. That seems to give about 1:2 with a 28mmm lens. For that you needa K mount ro 49mm thread adapter

A further possibliy is a close up lens on the front
Tony Milner
Super A, ME Super, MZ6, K5II, Ricoh GR & lenses from 8-500mm
www.amilner.org www.flickr.com/photos/tonymilner

richardmills

Link Posted 01/08/2010 - 19:12
i missed a jessops set of pka extension tubes on ebay early sat morning and the set in the classifieds.

thers a pk set left on ebay for 35 inc postage but like mannesty said id rather have the auto set.

i think 35 is a bit steep too.

dougf8

Link Posted 01/08/2010 - 19:15

Anvh

Link Posted 01/08/2010 - 19:57
amilner wrote:
Another possibility is simply reversing a wide angle lens on to the camera body. That seems to give about 1:2 with a 28mmm lens. For that you needa K mount ro 49mm thread adapter

Nope not 28mm, that would give you almost 4:1, you need 50mm stacked on top of a 100mm to get 2:1
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

Mike-P

Link Posted 01/08/2010 - 20:06

1:2 .. half life size.
No equipment list here but thanks for taking an interest. My Flickr

dougf8

Link Posted 01/08/2010 - 20:16
Mike-P wrote:

1:2 .. half life size.

Oooops, thought it would be bigger (or do I mean smaller).
Lurking is shirking.!

richardmills

Link Posted 01/08/2010 - 21:12
link

Deal or no deal?

That expensive?
or Any good for that matter?

Mike-P

Link Posted 01/08/2010 - 21:31
I put an offer in for that and he came back with a 76.05 counter offer. Mind you mine was well under what he is asking.

I must admit I have been thinking about selling my PK/A tubes.
No equipment list here but thanks for taking an interest. My Flickr
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