| View previous topic :: View next topic |
| Author |
Message |
jamaeolus
Joined: 19 Mar 2014
Posts: 2927
Location: Eugene
Expire: 2015-08-20
|
 Posted: Sat Dec 07, 2019 1:42 am Post subject: Kipon pentax 67 speedbooster. |
 |
|
jamaeolus wrote:
I have several pentax 67 lenses some of which are remarkably good. has anyone tried these. 0.7x and gain a stop is what I read. So my 165mm 2.8 becomes a 115 1.8? Are the optics good?
_________________
photos are moments frozen in time |
|
| Back to top |
|
 |
spleenone
Joined: 26 Dec 2009
Posts: 1130
Location: Slovakia
|
| Posted: Sat Dec 07, 2019 9:03 pm Post subject: |
|
|
spleenone wrote:
For that price of speedboster I am not sure. Saw one video on Vimeo, though. There was used Pentacon Six lenses.
_________________
Shoot on analog mainly with
Nikkor glass
then Pentacon6TL for squares
and Fujica GL690 in case of 6x9
Carpe diem! |
|
| Back to top |
|
|
Gatorengineer64
Joined: 26 Oct 2017
Posts: 279
|
| Posted: Sun Dec 08, 2019 4:28 am Post subject: |
|
|
Gatorengineer64 wrote:
I had a bunch of 67 lenses and found that slr lenses we're able to keep up... 105 vs nikon
105 as an example was indistinguishable....booster would move that lens into the 85 class and there is a lot of good and fast there...
_________________
A7R4, GFX50R and a bucket of mflenses |
|
| Back to top |
|
|
cooltouch
Joined: 15 Jan 2009
Posts: 9097
Location: Houston, Texas
|
| Posted: Mon Dec 09, 2019 1:45 am Post subject: |
|
|
cooltouch wrote:
I just took a look on eBay for Kipon and other brands of focal reducers that would work with Pentax 67 lenses on Pentax 67 bodies. I got no hits. Everything listed was for these lenses to be mounted on other cameras. Dang. It would be interesting to see what my 45mm would do with one of these things.
I guess that's typical, though. All the other focal reducers I've paid attention to are for one camera brand's lenses to be fitted to another camera.
_________________
Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
My Gallery: http://michaelmcbroom.com/gallery3/index.php/
My Flickr Page: https://www.flickr.com/photos/11308754@N08/albums
My Music: https://soundcloud.com/michaelmcbroom/albums
My Blog: http://michaelmcbroom.com/blogistan/ |
|
| Back to top |
|
|
visualopsins
Joined: 05 Mar 2009
Posts: 10531
Location: California
Expire: 2025-04-11
|
| Posted: Mon Dec 09, 2019 4:32 pm Post subject: |
|
|
visualopsins wrote:
| cooltouch wrote: |
I just took a look on eBay for Kipon and other brands of focal reducers that would work with Pentax 67 lenses on Pentax 67 bodies. I got no hits. Everything listed was for these lenses to be mounted on other cameras. Dang. It would be interesting to see what my 45mm would do with one of these things.
I guess that's typical, though. All the other focal reducers I've paid attention to are for one camera brand's lenses to be fitted to another camera. |
?
Focal reducers for 67 lenses are for other (typically FF) bodies, not 67, yes. I.e., 67 image circle is reduced to FF size without ropping, hence the speed increase...
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
|
|
| Back to top |
|
|
jamaeolus
Joined: 19 Mar 2014
Posts: 2927
Location: Eugene
Expire: 2015-08-20
|
| Posted: Mon Dec 09, 2019 6:39 pm Post subject: |
|
|
jamaeolus wrote:
They make 67 to Nikon F, 67 to EF, and 67 to NEX IIRC. They are expensive but for some of the P 67 GLASS it might be worth it if the optical element is high enough quality. You would get a unique lens.
_________________
photos are moments frozen in time |
|
| Back to top |
|
|
Gerald
Joined: 25 Mar 2014
Posts: 1196
Location: Brazil
|
| Posted: Tue Dec 10, 2019 1:59 am Post subject: |
|
|
Gerald wrote:
| cooltouch wrote: |
I just took a look on eBay for Kipon and other brands of focal reducers that would work with Pentax 67 lenses on Pentax 67 bodies. I got no hits. Everything listed was for these lenses to be mounted on other cameras. Dang. It would be interesting to see what my 45mm would do with one of these things.
|
A focal reducer reduces not only the focal length (not a big surprise!) but also the image circle! Therefore, if the original lens barely covers the 6x7 format, the same lens with a focal reducer does not! Nonetheless, a focal reducer designed for use with 6x7 lenses should cover the 35mm format ("full-frame").
_________________
If raindrops were perfect lenses, the rainbow did not exist. |
|
| Back to top |
|
|
cooltouch
Joined: 15 Jan 2009
Posts: 9097
Location: Houston, Texas
|
| Posted: Sat Dec 14, 2019 4:49 am Post subject: |
|
|
cooltouch wrote:
Yeah, ok, I get it. That's probably one reason why it's called a focal *reducer* after all.
I recently bought a 400mm f/4 for my P67. Wouldn't mind shooting with that on my NEX 7. At 0.7, that'd make it a 280mm f/2.8. Rather interesting, that.
_________________
Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
My Gallery: http://michaelmcbroom.com/gallery3/index.php/
My Flickr Page: https://www.flickr.com/photos/11308754@N08/albums
My Music: https://soundcloud.com/michaelmcbroom/albums
My Blog: http://michaelmcbroom.com/blogistan/ |
|
| Back to top |
|
|
ZoneV
Joined: 09 Nov 2009
Posts: 1633
Location: Germany
Expire: 2011-12-02
|
| Posted: Mon Dec 16, 2019 7:43 am Post subject: |
|
|
ZoneV wrote:
I work a lot with that Kipon 0.7x medium format to fullframe speedbooster.
Sometimes with lenses which are sold as fullframe lenses, some fast medium format ones Canon FD 300mm/2.8, 400mmf/2.8, Trioplan/Diaplan/Pentacon projection lenses 100mm f/2.8, Rubinar 500mm f/5.6, Wollensak (likely copy of Aero Ektar) 6" f/2.5, Pentacon projection 150mm f/2.8, Berolina (Vivitar) 135mm f/1.5...
The Pentax 165mm f/2.8 lens speedboosted to a 116mm f/2 would not be such interesstign for me.
Canon FD 400mm/2,8 -> 280mm/2.0 on Sony A7II
http://www.time.4photos.de/fast-wie-eine-galionsfigur/
http://www.time.4photos.de/fashion-photographie-in-der-natur/
Canon Fd 300mm f/2.8 -> 210mm f/2.0
http://www.time.4photos.de/frau-im-sturm/
_________________
Camera modification, repair and DIY - some links to look through: http://www.4photos.de/camera-diy/index-en.html
I AM A LENS NERD!
Epis, Elmaron, Emerald, Ernostar, Helioplan and Heidosmat.
Epiotar, Kameraobjektiv, Anastigmat, Epis, Meganast, Magnagon, Quinar, Culmigon, Novotrinast, Novflexar, Colorplan, Sekor, Kinon, Talon, Telemegor, Xenon, Xenar, Ultra, Ultra Star. Tessar, Janar, Visionar, Kiptar, Kipronar and Rotelar.
|
|
| Back to top |
|
|
Pancolart
Joined: 04 Feb 2008
Posts: 3693
Location: Slovenia, EU
Expire: 2013-11-18
|
| Posted: Mon Dec 16, 2019 4:49 pm Post subject: |
|
|
Pancolart wrote:
This is awesome! And this waw: http://www.time.4photos.de/fashion-photographie-in-der-natur/
So you don't get black borders and image still covers full frame despite lens not made for medium format?
_________________
---------------------------------
The Peculiar Apparatus Of Victorian Steampunk Photography: 100+ Genuine Steampunk Camera Designs https://www.amazon.com/dp/B0B92829NS |
|
| Back to top |
|
|
stevemark
Joined: 29 Apr 2011
Posts: 3754
Location: Switzerland
|
| Posted: Sat Dec 21, 2019 8:00 pm Post subject: |
|
|
stevemark wrote:
Many of these "old" supertele lenses cover a larger area than just FF. The large Leitz APO teles for instance, the early Nikkor 2.8/300mm, and obviously also the nFD 2.8/400mm ...
_________________
www.artaphot.ch |
|
| Back to top |
|
|
spleenone
Joined: 26 Dec 2009
Posts: 1130
Location: Slovakia
|
| Posted: Sat Dec 21, 2019 8:26 pm Post subject: |
|
|
spleenone wrote:
I found on vimeo test with those Pentacon6 CZJ lenses and focal reducer. Lets have a look.
https://vimeo.com/203257566
_________________
Shoot on analog mainly with
Nikkor glass
then Pentacon6TL for squares
and Fujica GL690 in case of 6x9
Carpe diem! |
|
| Back to top |
|
|
dickb
Joined: 04 Apr 2008
Posts: 821
|
| Posted: Sun Dec 22, 2019 6:43 pm Post subject: |
|
|
dickb wrote:
So these are taken with the Kipon 0.7x medium format to fullframe speedbooster, right? Since those lenses don't have a medium format mount but the FD mount, you can't do this with unmodified equipment, either the mount of the speedbooster or that of the lens must have been modified (or both of course). You used to have a DIY version of such a speedbooster, do you prefer the results of the Kipon? |
|
| Back to top |
|
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Search
Memberlist
Register
Profile
Log in to check your private messages
Log in
