Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-08-2012, 02:26 PM   #1
Veteran Member
Den's Avatar

Join Date: Jan 2012
Location: California
Posts: 927
Critical Focusing Tip

Being as I only use M lenses and have to focus manually, I was not always getting things as sharp as I knew they could be. I wear glasses and still don't have as sharp of vision as I would like , especially if the point of focus is small. I tried using live view but it wasn't that much better than the viewfinder and sometimes worse. So I started using a 4X and sometimes a 7X loupe on the live view screen. The camera is on a tripod and I'm not trying to catch a bird in flight, so for stationary subjects this works great! Thought I would pass this along to those (or anyone for that matter) that maybe having this type of problem.
Maybe this should have gone in techniques?

02-08-2012, 02:44 PM   #2
Site Supporter
Stone G.'s Avatar

Join Date: Jun 2010
Location: North Zealand, Denmark
Photos: Gallery | Albums
Posts: 1,508
I am not questioning your findings and experiences - just curious as I wear glasses too:

Don't you find liveview at 10X magnification useful? I don't use it all the time but - as one example - for astrophotograhy I find it very efficient.
02-08-2012, 02:53 PM   #3
Pentaxian




Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,582
Have you tried the Pentax O-ME53 magnifying eyepiece?
'Magnifying eyepiece for Pentax digital SLR cameras. It features 1.2x magnification and clip-on mount.'

It's often more easy to use than relying on LV, I've found, especially if the subject is moving or the ambient light is too bright and washes out the LV display.
02-08-2012, 03:02 PM   #4
Veteran Member
demp10's Avatar

Join Date: Jun 2011
Location: Atlanta
Photos: Albums
Posts: 602
I use LV a lot for stationary studio work, especially in macro mode. It is the best way to get precise focus. A split focus screen with micro prisms helps to get focus close enough, but LV nails it, especially with slow lenses on long extensions. 6X on LV is my limit most of the times, beyond that the image gets a bit blurry. I use an HDTV 20" screen to view the image so I do not need to wear glasses or magnifiers.

02-08-2012, 03:06 PM   #5
Veteran Member
igor's Avatar

Join Date: Dec 2008
Location: USA and Europe
Posts: 555
good if it works for you.
My eyesight isn't good already too, so I use another trick for handheld manual focusing, especially on macro shoots or with fast wide open lenses with narrow DOF.
First I focus to the point I estimate as the best/sharpest (which isn't always there ), then I lean a bit backwords and shoot , the forward a bit, shoot again, another slight move forward, shoot, and one or two more. It works like a focus bracketing of some sorts
In most cases one of the frames is sharp enough.
Try it
02-08-2012, 03:12 PM   #6
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,624
Whenever I'm on a tripod, I automatically go into remote shutter and Live view manual focusing mode. No matter what the situation!
02-08-2012, 03:39 PM   #7
Site Supporter
Stone G.'s Avatar

Join Date: Jun 2010
Location: North Zealand, Denmark
Photos: Gallery | Albums
Posts: 1,508
Speaking about focus tips and in line with demp10's suggestions above:

Did you know that you cˇuld use a video grabber (the kind of cable used to digitize analogue video tapes) to have live view on a PC.

Here shown with a small netbook that makes a handy "field" set-up:
Attached Images
View Picture EXIF
PENTAX K200D  Photo 
View Picture EXIF
PENTAX K200D  Photo 
02-08-2012, 04:09 PM   #8
Veteran Member
demp10's Avatar

Join Date: Jun 2011
Location: Atlanta
Photos: Albums
Posts: 602
QuoteOriginally posted by Stone G. Quote
Speaking about focus tips and in line with demp10's suggestions above:

Did you know that you cˇuld use a video grabber (the kind of cable used to digitize analogue video tapes) to have live view on a PC.

Here shown with a small netbook that makes a handy "field" set-up:
Very nice setup. I assume that you are using the composite video output and not the HDMI from the camera. I prefer the HDMI to get 1920 x 1080 output and not the 640 x 480 on analog, especially to review the images afterwords.

02-08-2012, 04:17 PM   #9
Site Supporter
Stone G.'s Avatar

Join Date: Jun 2010
Location: North Zealand, Denmark
Photos: Gallery | Albums
Posts: 1,508
QuoteOriginally posted by demp10 Quote
Very nice setup. I assume that you are using the composite video output and not the HDMI from the camera. I prefer the HDMI to get 1920 x 1080 output and not the 640 x 480 on analog, especially to review the images afterwords.
You are right. I have yet to find a way (if there is one) to input the HDMI signal into an ordinary PC. In stead of the video grabber I can use a USB PCTV device, but again, only for composite video.

Any suggestions?
02-08-2012, 04:47 PM   #10
Veteran Member
demp10's Avatar

Join Date: Jun 2011
Location: Atlanta
Photos: Albums
Posts: 602
QuoteOriginally posted by Stone G. Quote
You are right. I have yet to find a way (if there is one) to input the HDMI signal into an ordinary PC. In stead of the video grabber I can use a USB PCTV device, but again, only for composite video.

Any suggestions?
There are a few DVI to USB frame grabbers like this one DVI2USB Solo | DVI frame grabbers | Products | Epiphan Systems but at $700 is way too expensive just to feed live video from your camera.

Getting a full 1080 HDTV is probably the cheapest and most practical solution in the studio. There are small field monitors 7" in diameter that attach on the hot shoe, run on batteries and have HDMI input, but their native resolution is the same as the LCD in the camera, so little advantage there. They are very useful though when shooting video.
02-15-2012, 10:27 AM - 1 Like   #11
Senior Member




Join Date: Apr 2008
Photos: Gallery
Posts: 168
QuoteOriginally posted by demp10 Quote
There are a few DVI to USB frame grabbers like this one DVI2USB Solo | DVI frame grabbers | Products | Epiphan Systems but at $700 is way too expensive just to feed live video from your camera.

Getting a full 1080 HDTV is probably the cheapest and most practical solution in the studio. There are small field monitors 7" in diameter that attach on the hot shoe, run on batteries and have HDMI input, but their native resolution is the same as the LCD in the camera, so little advantage there. They are very useful though when shooting video.
Black Magic Design has a product line for HDMI capture. I haven't looked at it too closely, but,



Blackmagic Design: Intensity

The Intensity Pro (PCIe card) and Intensity Shuttle (USB 3) are $199, might be worthwhile.
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!
camera, dslr, focus, k-5, k-5 ii, k-5 iis, k5, live, pentax k-5, view
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wisconsin Republican Party targets UW Prof. over blog/op-ed piece critical of Walker deadwolfbones General Talk 4 03-28-2011 03:35 AM
Are we (Pentaxians) more critical than Canikonians? Eric Seavey Pentax K-5 14 12-07-2010 06:54 PM
For Sale - Sold: P645 Viewfinder Magnifier for Critical Focusing (very rare) (Worldwide) Dubesor Sold Items 7 09-09-2010 04:19 PM
70-200mm 2.8 --> How critical is it? What are the options? bodhi08 Pentax SLR Lens Discussion 8 08-30-2010 08:45 AM
Looking for Critical Review PaulAndAPentax Post Your Photos! 11 08-18-2007 06:59 AM



All times are GMT -7. The time now is 06:05 PM. | See also: NikonForums.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