Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version 2 Likes Search this Thread
01-15-2013, 12:40 AM   #16
Veteran Member
Jasvox's Avatar

Join Date: Oct 2007
Location: Melbourne, Australia
Posts: 3,107
Alpha mount to NEX mount
Alpha mount to X mount
Leica R to NEX mount
Leica R to X mount

Speed Booster?

600 bucks...


Jason

01-15-2013, 06:30 AM   #17
Pentaxian
Mistral75's Avatar

Join Date: Feb 2009
Location: Paris, France
Posts: 7,527
QuoteOriginally posted by Jasvox Quote
Alpha mount to NEX mount
Alpha mount to X mount
Leica R to NEX mount
Leica R to X mount

Speed Booster?

600 bucks...


Jason
Alpa mount, not Alpha.

01-15-2013, 08:43 AM   #18
Veteran Member




Join Date: Apr 2010
Location: Tennessee
Posts: 6,617
Original Poster
Comparison: APS-C with Speed Booster VS Full Frame | Fuji Rumors

Since I shoot with primes 100% of the time I like the idea behind the product. I just hope it performs as advertised. 3 lenses and this adapter would give you the equivalent of 6 lenses. The Fuji X system is looking better an better......
01-15-2013, 09:46 AM   #19
Veteran Member
demp10's Avatar

Join Date: Jun 2011
Location: Atlanta
Photos: Albums
Posts: 602
QuoteOriginally posted by Winder Quote
Yeah, but in the same way that an tele-converter degrades IQ this would improve IQ if their statements are true.
A teleconverter does not degrade IQ because it is a teleconverter, but because it adds a number of glass elements behind the lens that were not part of the original design. The same way front converters (both tele and wide) and filters will degrade IQ.

If a reverse teleconverter was able to improve IQ, then I am sure that many lenses would have been designed as telephotos with a build-in converter.

It would be interesting to see the differences when some real tests are published.

01-15-2013, 10:06 AM   #20
Pentaxian
Mistral75's Avatar

Join Date: Feb 2009
Location: Paris, France
Posts: 7,527
First test of a prototype by EOSHD:

Prototype Metabones Speed Booster equipped NEX 7 *VS* full frame 5D Mark III – 1st comparison shots | EOSHD.com

Bodies: NEX-7 + Speed Booster vs EOS 5D Mk III.

Lenses used: Sigma 24mm f/1.8 - Samyang 35mm f/1.4 - Canon EF 40mm f/2.8 pancake.

Tester's comment: "This is a groundbreaking product for photographers and cinematographers alike."
01-15-2013, 10:07 AM   #21
Veteran Member




Join Date: Apr 2010
Location: Tennessee
Posts: 6,617
Original Poster
QuoteOriginally posted by demp10 Quote
A teleconverter does not degrade IQ because it is a teleconverter, but because it adds a number of glass elements behind the lens that were not part of the original design. The same way front converters (both tele and wide) and filters will degrade IQ.

If a reverse teleconverter was able to improve IQ, then I am sure that many lenses would have been designed as telephotos with a build-in converter.


It would be interesting to see the differences when some real tests are published.
A TC magnifies an image and makes flaws more pronounced just like enlarging a print. There is a lot more to it than simple glass elements causing degradation.
First tests are already being posted.
Prototype Metabones Speed Booster equipped NEX 7 *VS* full frame 5D Mark III – 1st comparison shots | EOSHD.com

http://www.eoshd.com/content/9467/aps-c-and-super-35mm-just-went-full-frame-...-speed-booster
01-15-2013, 05:52 PM - 1 Like   #22
Veteran Member
cali92rs's Avatar

Join Date: May 2011
Location: Long Beach, CA
Posts: 3,354
...Another Mirrorless advantage.
Hopefully Pentax is paying attention.

01-16-2013, 01:55 AM   #23
Veteran Member
Clavius's Avatar

Join Date: Feb 2011
Location: De Klundert
Photos: Gallery
Posts: 4,150
QuoteOriginally posted by cali92rs Quote
...Another Mirrorless advantage.
Hopefully Pentax is paying attention.
Seeing the current state of their flash system, sensor formats, lens lineup, 3rd party support, tethering, etc... I'd say good luck with that! LOL! I agree, lets hope Ricoh is able to whip some new survival-spirit into Pentax.
01-16-2013, 07:07 AM   #24
HSV
Veteran Member




Join Date: Sep 2012
Location: Texas
Posts: 321
Interesting implementation, sounds very promising!

Just curious...is the reduced flange distance a requirement for this to work? What are the effects on depth of field (asumming an equal framing)?

What would be the benefits of a real FF vs a "boosted" APS-C?

I think that signal to noise ratio would be one benefit of the FF (because of larger photosites).

Since this thing has AF (for EF lenses) and it doubles the light, in theory this should improve AF accuracy.
01-16-2013, 08:40 AM   #25
Veteran Member




Join Date: Apr 2010
Location: Tennessee
Posts: 6,617
Original Poster
QuoteOriginally posted by HSV Quote
Interesting implementation, sounds very promising!

Just curious...is the reduced flange distance a requirement for this to work? What are the effects on depth of field (asumming an equal framing)?

What would be the benefits of a real FF vs a "boosted" APS-C?

I think that signal to noise ratio would be one benefit of the FF (because of larger photosites).

Since this thing has AF (for EF lenses) and it doubles the light, in theory this should improve AF accuracy.
Yes. You would need a mirrorless body for "most" of these adapters to work or the lenses wont focus properly.

We will have to see how this effects the gap between the two sensor sizes. I have said for a long time that APS-C can match FF performance if you have faster sharper glass (sharper at larger apertures), but this makes APS-C lenses more expensive than FF lenses. This adapter wont be cheap, but it can be used on multiple lenses.

The photosites on the 36MP D800 are the same size as the photosites on the 16MP K-5. You have to enlarge the K-5 image 2x as much to match the output of the D800 so even if noise is equal the K-5 will look noisier (especially on a back illuminated monitor) than the D800.
01-16-2013, 08:41 AM   #26
Veteran Member




Join Date: Apr 2010
Location: Tennessee
Posts: 6,617
Original Poster
(UPDATED) Metabones Speed Booster adapter will be made for OM lenses too! | 43 Rumors
01-16-2013, 10:41 AM   #27
Veteran Member




Join Date: Nov 2009
Location: Hong Kong
Posts: 1,352
QuoteOriginally posted by Winder Quote
Comparison: APS-C with Speed Booster VS Full Frame | Fuji Rumors

Since I shoot with primes 100% of the time I like the idea behind the product. I just hope it performs as advertised. 3 lenses and this adapter would give you the equivalent of 6 lenses. The Fuji X system is looking better an better......
Huh?

Unless the Fuji mirrorless camera lenses produce a FF image circle, it is utterly useless for that "range" of (2, basically the same, right?) cameras.

I do like the product, but acclaiming it as a Fuji-booster is waaay off the mark. Stating it politely.
01-16-2013, 10:55 AM   #28
Veteran Member




Join Date: Apr 2010
Location: Tennessee
Posts: 6,617
Original Poster
QuoteOriginally posted by Unsinkable II Quote
Huh?

Unless the Fuji mirrorless camera lenses produce a FF image circle, it is utterly useless for that "range" of (2, basically the same, right?) cameras.

I do like the product, but acclaiming it as a Fuji-booster is waaay off the mark. Stating it politely.
It make the Fuji system look better to me because I have some older Olympus, Contax, Canon FD glass that I could use on the Fuji body. It has nothing to do with Fuji lenses. The adapter allows you to use FF glass on an APS-C body (which the Fuji is) and get better results. It seems way off the mark because you don't know where the mark is..... stating it politely....
01-16-2013, 12:28 PM   #29
Forum Member




Join Date: May 2009
Location: Plymouth,United Kingdom
Posts: 72
I'm assuming from a quick read that there is no chance of this ever being an adapter I could use on my K5 with Pentax lens

Trevor
01-16-2013, 12:34 PM   #30
Junior Member




Join Date: Oct 2012
Location: Czech Republic (EU)
Posts: 44
QuoteOriginally posted by climbertrev Quote
I'm assuming from a quick read that there is no chance of this ever being an adapter I could use on my K5 with Pentax lens

Trevor
no you cannot

but it would be amazing to have k-01 with this adapter build-in from factory in the space of mirror box (where k-01 has wasted space) and evf, I would but it immediately even knowing that you cannot use most DA lenses...
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
adapter, booster, fuji, mirrorless

Similar Threads
Thread Thread Starter Forum Replies Last Post
6X7 TTL Prism -is speed dial adapter ring needed? germar Pentax Medium Format 12 04-20-2016 07:34 AM
Genuine Pentax Mount Adapter B or M42 To K adapter SANDY1977 Pentax Camera and Field Accessories 9 06-22-2013 02:41 PM
RJ adapter and coming Pentax adapter? pinholecam Pentax Q 11 02-17-2012 02:02 PM
AF speed watch.....dedicated speed thread Steelski Pentax K-01 6 02-02-2012 07:25 AM
For Sale - Sold: Canon Power Drive Booster PB-E2 box and manual (CONUS) RayGunn Sold Items 2 12-20-2010 07:02 PM



All times are GMT -7. The time now is 12:02 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top