Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-12-2015, 02:34 AM   #16
Pentaxian




Join Date: Feb 2015
Photos: Gallery | Albums
Posts: 8,780
Original Poster
Given the focal length, and speed, those shots look really good. No sure I could have achieved the same results with a K-3 (supposed to have better AF).

12-12-2015, 04:44 AM   #17
Veteran Member




Join Date: Jun 2009
Posts: 11,913
I believe those shots are totally doable with a K-3, if you have skills and experience akin to osv. The Pentax lenses are there too now (ie the D FA 150-450), if you have the money.
12-12-2015, 06:29 AM   #18
Loyal Site Supporter
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 14,967
QuoteOriginally posted by biz-engineer Quote
Given the focal length, and speed, those shots look really good. No sure I could have achieved the same results with a K-3 (supposed to have better AF).
Aw, you sound depressed, Biz-engineer.

This guy does motorsports wirh a humble K-30, so can you:

https://www.ephotozine.com/article/shooting-motorsport-with-the-pentax-k-30-22663
12-12-2015, 08:45 AM   #19
Pentaxian




Join Date: Feb 2015
Photos: Gallery | Albums
Posts: 8,780
Original Poster
QuoteOriginally posted by clackers Quote
Aw, you sound depressed, Biz-engineer.
Yeah , you are probably right, the shots above from the A7 done in sunny conditions so the K-3 AF should deliver and noise should not be an issue.

12-12-2015, 11:21 AM   #20
osv
Veteran Member




Join Date: Mar 2007
Location: So Cal
Photos: Gallery
Posts: 2,080
i think that you could definitely do this with a k3/fa150-450, and you'd have the advantage of weather-resistant sealing, the only thing i had was tape around the lens mount, and a home-made sock around the lens :-/ everything was covered with a coat of fine sand, the wind was blowing it right in our faces.

the af in the la-ea4 adapter is ~five(?) years old now, it's 15 AF points... it's older technology than the k3 af(2013, 25 cross-type af points), so pentax looks better for af.
12-14-2015, 01:47 PM   #21
Veteran Member
neostyles's Avatar

Join Date: Jul 2013
Posts: 445
QuoteOriginally posted by biz-engineer Quote
Thinking about how small are mirror-less camera bodies are. But if lenses are as big/heavy as the one mounted on dslrs, what's the point? For photographers already equipped with a mirrorless system, is there any size/weight advantage of the optics designed for mirrorless versus lenses designed for DSLRs?
I dont know if the lenses are lighter but the bodies weigh quite a bit less. The sony a6000 is roughly half the size of canon/nikon apsc dslrs. Its really true and the a7 series is only somewhat bigger. The camera that ive been raving about, the NX1, is somewhat bigger as its dslr styled but it weighs 150 grams less. The real advantage is just not having all the bulk of a dslr. Mirrorless cameras are much thinner than their dslr counter parts. Lenses seem to way somewhat less actually now that i look at it. Samsung 16-50 weighs 1.3 pounds. Nikon's 17-55 weighs 1.6.
12-14-2015, 05:23 PM   #22
Loyal Site Supporter
Loyal Site Supporter




Join Date: Jun 2011
Location: Texas
Photos: Gallery
Posts: 1,420
I use my A7 primarily with my old Pentax-M lenses, which makes for a small kit. The M series were made for the compact ME and MX film bodies, and so work well on the small A7. Of course manual focus, but that's all I've used for over 50 years. The Voigtlander PK to NEX adapter is the best I've found - sadly discontinued. (I have no "native" lenses for the A7, but also use some Leica lenses on it.)

12-14-2015, 06:02 PM   #23
New Member




Join Date: Dec 2015
Posts: 3
Ma grain of salt...or sand ;)

As a mirrorless user (E-PL5 and now E-M10), i will give my point of view.
First, there are Contrast AF (most mirrorless) only AND hybrid Contrast/Phase (on sensor) AF cameras.
E-M1 and GH4, to name a few.
E-M1 can even use old reflex Four Third lenses...and sometimes faster than native camera.

Basically, mirrorless Contrast AF is really fast, but on S-AF only.
With C-AF, E-M1 use Phase (better). GH4 probably too.
C-AF is very bad on Contrast AF only.

About bulk/size, m43 can be really nice (crop factor 2X for telephoto, amazing small wide angle lenses...).
On an APS-C (Sony, Fuji...), you will not gain a lot until you use pancakes/small zooms.

That's why i opted for Olympus (and sensor stab).
I can use a small 40-150mm, giving me 80-300 eq. And with the size of a 18-55 aps-c kit. Don't even speak about 20mm (40 eq) pancake
I don't do much action, so Contrast only E-M10 is not a problem to me. I put C-AF to focus priority. I get only 3 fps, but in focus. In S-AF, 9fps but no refocus between shots. Need to short burst/being parallel to subject.

I will learn action manual focus, too

To make it short : it depends (as usual) on your needs. Just don't expect any APS-C system being much smaller because you "just" removed mirror

PS : i did a funny comparison : taking only Sony sensors specs on DxO, same generation.
-FF to APS-C : you loose 1 stop ISO, 1 stop dynamic and 1 color bitdepth
-APS-C to M43 : same
12-15-2015, 12:51 PM   #24
Pentaxian




Join Date: Feb 2015
Photos: Gallery | Albums
Posts: 8,780
Original Poster
QuoteOriginally posted by neostyles Quote
I dont know if the lenses are lighter but the bodies weigh quite a bit less. The sony a6000 is roughly half the size of canon/nikon apsc dslrs. Its really true and the a7 series is only somewhat bigger.
I'd rather go for FF or APSC MILC body. Now, I have the impression that the gain of size/weight of MILC body and AF tracking limitation is worth for short FL. When used with long tele lenses, the size and weight of the lens itself is such that it requires a camera body with sufficient handling and fast autofocus for tracking.

QuoteOriginally posted by TomB_tx Quote
I use my A7 primarily with my old Pentax-M lenses, which makes for a small kit. The M series were made for the compact ME and MX film bodies, and so work well on the small A7. Of course manual focus, but that's all I've used for over 50 years. The Voigtlander PK to NEX adapter is the best I've found - sadly discontinued. (I have no "native" lenses for the A7, but also use some Leica lenses on it.)
I understand. Old manual lenses are rather compact for their max aperture (they do not have any AF motor or stabilization) and the in body stability of the A7 makes it attractive to use with M lenses. Definitely interesting for manual focus.

QuoteOriginally posted by gLOW-x Quote
About bulk/size, m43 can be really nice (crop factor 2X for telephoto, amazing small wide angle lenses...).
Yes, u4/3 offers a substantial weight/size gain over APCS/FF, but I'm afraid that I wouldn't be satisfied with the IQ.
12-15-2015, 03:32 PM   #25
Pentaxian
mecrox's Avatar

Join Date: Apr 2009
Location: Oxford, UK
Photos: Gallery
Posts: 2,375
QuoteOriginally posted by biz-engineer Quote
I'd rather go for FF or APSC MILC body. Now, I have the impression that the gain of size/weight of MILC body and AF tracking limitation is worth for short FL. When used with long tele lenses, the size and weight of the lens itself is such that it requires a camera body with sufficient handling and fast autofocus for tracking.


I understand. Old manual lenses are rather compact for their max aperture (they do not have any AF motor or stabilization) and the in body stability of the A7 makes it attractive to use with M lenses. Definitely interesting for manual focus.


Yes, u4/3 offers a substantial weight/size gain over APCS/FF, but I'm afraid that I wouldn't be satisfied with the IQ.
My guess is that in the end, a lot of folks go with a MILC for its modernity and adaptability. You get a lot of things that traditional DSLRs don't have, either often or at all, and short-registration MILCs are adaptable in the sense that a lot of lenses from different brands can be mounted on them (with mixed results, of course). There may be some weight/size saving in the smaller formats but by the time one gets to FF and big long lenses, I doubt it is all that significant. Having used a MILC for a few months now, I have no plans to buy another DSLR. I would miss too many things - focus peaking and exposure warnings in the VF, good wifi and apps, automatic focus stacking among them. In my case I've found M43 a very acceptable compromise, not least because Olympus make very good lenses. One result is that I can get better results in low light than I can with a K3 because I can shoot wide open on the Olympus at very low shutter speeds thanks to their IBIS, whereas I need to stop down quite a bit on the K3 to obtain the same level of acuity across the frame and use slightly higher shutter speeds because the Pentax IBIS is not quite so good. Technique matters a lot here, of course, but on the whole I get better results with the Oly.

It's all horses for courses. I can well see that M43 wouldn't produce the goods for some folks and nor, perhaps, would APS-C. For me, enjoyment comes first and I know I would not enjoy lugging big stuff around. For those who don't mind, a Sony A7RII and some of those new Zeiss FE lenses look pretty hard to beat, imho, even if not for every kind of photography. But, er hem, you will pay $$ for it all.
12-15-2015, 11:35 PM   #26
Veteran Member
cali92rs's Avatar

Join Date: May 2011
Location: Long Beach, CA
Posts: 3,354
QuoteOriginally posted by luftfluss Quote
Fuji mirrorless lenses are big
Thats a generalization that isn't necessarily true. Look at the pentax 14mm vs the Fuji 14mm, pentax vs Fuji 18-55mm's, the Fuji 35mm f1.4, and some other pancakes that escape my memory.
Another point of comparison is the Fuji 23mm f1.4 is much smaller than the Canikon 24mm f1.4 lenses (the K-mount variety, if it existed, must be a similar size). I could easily fit a 4 lens fuji kit with my x-t1 in my domke bag.
But then again, i actually owned both a Fuji and Pentax kit instead of regurgitating stuff I read online.

Last edited by cali92rs; 12-15-2015 at 11:50 PM.
12-15-2015, 11:53 PM   #27
Site Supporter
Site Supporter
luftfluss's Avatar

Join Date: Jun 2011
Location: NJ
Photos: Gallery | Albums
Posts: 8,553
QuoteOriginally posted by cali92rs Quote
Thats a generalization that isn't necessarily true. Look at the pentax 14mm vs the Fuji 14mm, pentax vs Fuji 18-55mm's, the Fuji 35mm f1.4, and some other pancakes that escape my memory.
Another point of comparison is the Fuji 23mm f1.4, which is much smaller than the Pentax FA 24mm f2.0, despite being a stop faster. I could easily fit a 4 lens fuji kit with my x-t1 in my domke bag.
But then again, i actually owned both a Fuji and Pentax kit instead of regurgitating stuff I read online.
Relax. Given that we are in a thread discussing mirrorless, I would think it evident that my comment about Fuji lenses being "big" was made in relation to other mirrorless systems, most particularly m4/3... not compared with Pentax.

It's a shame that, instead of taking a shot at me, you did not simply request clarification on my part.
12-16-2015, 09:19 AM   #28
Veteran Member
cali92rs's Avatar

Join Date: May 2011
Location: Long Beach, CA
Posts: 3,354
QuoteOriginally posted by luftfluss Quote
Relax. Given that we are in a thread discussing mirrorless, I would think it evident that my comment about Fuji lenses being "big" was made in relation to other mirrorless systems, most particularly m4/3... not compared with Pentax.

It's a shame that, instead of taking a shot at me, you did not simply request clarification on my part.
This was the OP:
QuoteQuote:
Thinking about how small are mirror-less camera bodies are. But if lenses are as big/heavy as the one mounted on dslrs, what's the point? For photographers already equipped with a mirrorless system, is there any size/weight advantage of the optics designed for mirrorless versus lenses designed for DSLRs?
i.e. Why go with mirrorless if the lenses are as big as DSLR's?
My point was that, no, they are not as big as DSLR lenses.

I apologize for the snark directed at you.
12-16-2015, 09:39 AM   #29
MJL
Site Supporter
Site Supporter
MJL's Avatar

Join Date: Jan 2011
Location: The Canadian WetCoast
Photos: Albums
Posts: 379
If you shot portraits, you will notice people are (in general) more relax in front of a smaller "mirrorless". Change into a dSLR and most subject will start to tense up, and may also annoyed by the dSLR mirror flapping noise.
12-16-2015, 09:45 AM   #30
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 19,746
QuoteOriginally posted by MJL Quote
If you shot portraits, you will notice people are (in general) more relax in front of a smaller "mirrorless". Change into a dSLR and most subject will start to tense up, and may also annoyed by the dSLR mirror flapping noise.
I found this to be more about the size of the lens. Put a DA 40 on my K3 and people give me relaxed visages. Put 50-135 on and they tense up. This does not matter if you spend enough time with them relaxing them. It seems more of an issue with very informal shots.
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!
blackout, dslrs, lenses, mirrorless, sensor
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
So why is mirrorless autofocus not up there with dslrs? neostyles Non-Pentax Cameras: Canon, Nikon, etc. 9 10-19-2015 04:00 PM
Wife's birthday which dslr/mirrorless? Pentax or not? r-p Troubleshooting and Beginner Help 19 03-17-2015 08:12 AM
Full frame on DSLR or Mirrorless Lakai Pentax Full Frame 93 12-13-2014 04:50 AM
Other brand mirrorless not selling Medium FormatPro Non-Pentax Cameras: Canon, Nikon, etc. 12 01-02-2013 03:28 PM



All times are GMT -7. The time now is 05:50 AM. | 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