Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-26-2008, 01:24 PM   #1
Site Supporter
Bramela's Avatar

Join Date: Jan 2007
Location: Newcastle Australia
Photos: Gallery | Albums
Posts: 5,281
Manual Focus lens

I recently acquired a Vivitar 105mm Macro lens, which is manual focus.
I also have a Pentax M135mm 3.5 lens, . These 2 lens are just brilliant lens to have in the bag as they give such sharp results.
PROBLEM? I am in over 60's bracket and my eyes certainly ain't what they used to be. I wear glasses all the time. I find that I am having some focussing problems with manual lens even if the beep is operational on the camera, as I dont feel that the signal give 100% accuracy and requires a little tweeking.
My results are not what I would expect from the lens.
Any suggestions from somebody out there with similar difficulties?
It is very frustrating to say the least.
e.g have a look at my last posting in the POTW thread, of this week.

05-26-2008, 01:28 PM   #2
Ed in GA
Guest




Bruce,

Have you considered getting the O-ME53 Magnifying Eyecup or a Katz-eye split screen focusing screen for your camera?

I have the eyecup and am seriously considering the Katz-Eye for my K20D. I am 63 and I'm not nearly as steady as I used to be and my eyes do deceive me from time to time....

Ed
05-26-2008, 01:35 PM   #3
Veteran Member




Join Date: Mar 2008
Location: Nowhere, Sweden
Photos: Gallery
Posts: 654
Get a split focusing screen, like the ones on the analog cameras and perhaps a magnifier
05-26-2008, 01:42 PM   #4
Site Supporter
Bramela's Avatar

Join Date: Jan 2007
Location: Newcastle Australia
Photos: Gallery | Albums
Posts: 5,281
Original Poster
Thanks for the quick reply guys.
I have been sonsidering the Katz-eye, but wasnt sure it would be the solution.
OK I will pursue that one, and I was not aware of the magnifyer. That sounds ideal and will look into that immediately (pun intended)

Thanks a lot , much appreciated.

05-26-2008, 01:47 PM   #5
Loyal Site Supporter
monochrome's Avatar

Join Date: Mar 2008
Location: Kirkwood (St. Louis) MO
Photos: Gallery | Albums
Posts: 20,326
Manual lenses for the sharp-vision challenged

Bruce: I'm 53, but I have advanced glaucoma and little peripheral vision - tri-focals and the whole gig.

The Vivitar lens is my toughest lens to use since it is so sensitive, but when it is right, it is REALLY right.

I've done the following:
  • I shoot full-manual so I don't have to rely on the viewfinder information
    • Sometimes I meter externally
  • I set the diopter so the LED's are as sharp and I can make them.
    • That alone helped a lot.
  • I got the O-ME53 Eyecup to view what I am focusing on in greater detail and it helped immensely.
    • I can look "through" the viewfinder to my image now
  • I pretty much always use a tripod with manual lenses
  • Next step, if necessary, is the KatzEye split screen, but I don't think it will be necessary
Sure, it limits what I can do with manual lenses, but I also have a small kit of FA's and DA's for the auto stuff.

Paul
05-26-2008, 01:56 PM   #6
Site Supporter
Bramela's Avatar

Join Date: Jan 2007
Location: Newcastle Australia
Photos: Gallery | Albums
Posts: 5,281
Original Poster
Thanks, Paul, I can see there is hope ffor me yet!
Appreciated greatly.... Bruce.
05-26-2008, 02:46 PM   #7
Veteran Member
jsherman999's Avatar

Join Date: Dec 2007
Photos: Gallery
Posts: 8,228
Also, one thing I was doing wrong in the early days of my MF/DSLR adventure - I was assuming the beep and appearance of the red rectangle meant focus had been reached, when it really just means that the focus target has been locked on - when you see the green hexagon appear (and stay,) that means the target is in focus.

Once I started watching for the green hexagon and not the beep/red rectangle, my MF-ing got a lot more accurate.
05-26-2008, 03:07 PM   #8
Veteran Member
TourDeForce's Avatar

Join Date: Jan 2008
Location: Florida
Photos: Gallery
Posts: 512
Good tip Jay.

The first accessory for my K100 was an magnifier. It was on the camera before I took the first picture. I now have a split focusing screen and that has been the difference for me. Both are good mods that will help you enjoy the craft.

Best of luck all!

05-26-2008, 04:09 PM   #9
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,450
You might consider using snap-in-focus with your manual lenses. When you have a manual focus lens mounted on a Pentax AF camera, digital or film, and you set the camera to AF.S, the exposure will be taken only when the camera detects correct focus.

I use this mode particularly with the M 100/4 macro I have. I can set the lens to an appropriate magnification, and chase the insect with the shutter button depressed all the way. The only drawback is that the only focus point that can be used is the center point.
05-26-2008, 04:33 PM   #10
Site Supporter
Bramela's Avatar

Join Date: Jan 2007
Location: Newcastle Australia
Photos: Gallery | Albums
Posts: 5,281
Original Poster
Must say, you people are a wealth of information. I thanks you all.
Will try the method you prescribe Arthur, sounds good/ and thanks too Jay will look into that focussingmore closely.
In the meantime, I have ordered the magnifier you mention, already, should be here in a couple of days.

Many thanks all, if ,after all this, I cant get it right, I think a good dose of Brandy before I start will be the only other resort !
05-26-2008, 07:58 PM   #11
Site Supporter
Bramela's Avatar

Join Date: Jan 2007
Location: Newcastle Australia
Photos: Gallery | Albums
Posts: 5,281
Original Poster
Posted a shot in POTW using Arthur's (Canada Rockies) method.
A great help. Not the greatest shot but its a big improvement.
Added a sample here :
Vivitar 105mm Macro/10kd
Attached Images
 
05-26-2008, 08:28 PM   #12
Senior Member
Outlaw's Avatar

Join Date: Feb 2008
Location: Adelaide, Australia
Photos: Gallery
Posts: 108
Interesting thread Bruce - I am 54 and finding similar issues. Lack of streadiness in the hands and reduced acuity in my "good" eye. Just posted a thread in the Accessories area asking abouth the best type of design for split focusing screens. Thought about some form of magnification too so your thread is timely and I now know - I am not alone. . .

This is a wonderful forum with so many helpful members. Thanks all.
05-27-2008, 12:27 AM   #13
Veteran Member
pentagor's Avatar

Join Date: Dec 2007
Location: Ljubljana, Slovenia
Photos: Gallery
Posts: 473
I'm using MF lenses a lot. I got O-ME53 Magnifying Eyecup and there is another trick I found: rotate the focusing ring to the smallest distance possible first and then try to focus from this point. As soon as the focus confirmation light goes on, the subject is in focus. This means focus from the front of the subject.
I don't know if anyone else discovered this, but it works for me.
03-30-2010, 08:28 AM   #14
Site Supporter




Join Date: Aug 2008
Location: Surrey, UK
Photos: Gallery
Posts: 53
QuoteOriginally posted by pentagor Quote
rotate the focusing ring to the smallest distance possible first and then try to focus from this point. As soon as the focus confirmation light goes on, the subject is in focus. This means focus from the front of the subject.
I know it's an old thread, but... That's so simple and makes so much sense. Thanks.
03-30-2010, 09:35 AM   #15
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,399
while this might seem like a smart response, please do not take it that way.

If you really are serious about shooting more and more with manual focus lenses, and perhaps manual aperture, look at picking up a used *istD with a split image.

the reason I suggest an *istD is that it has TTL flash and some time you will want to have flash metering with the old glass.

A split image speakes for itself.

When I upgraded to K7, I kept my K10D and put a split image into it. I used a jionfinance 45 degree diagonal split image because I liked the diagonal split image my Rikoh XR2-s film camera has.

It is a good idea to have a MF body, set up with all the advantages you can take, and there are a lot of good used cameras out there.

Otherwise, kust keep the K20 when you get the next urge to upgrade and put a split image into it.
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!
focus, k-mount, lens, pentax lens, results, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can a manual-focus lens have back focus problems? PocketPixels Pentax DSLR Discussion 33 02-13-2011 05:37 AM
manual focus lens into AF? SebastianP Pentax SLR Lens Discussion 19 11-03-2010 09:46 AM
Front focus/ back focus on Manual lens. Possible? WangJianWei Troubleshooting and Beginner Help 6 04-20-2009 07:50 PM
manual lens focus question kjfaust Pentax DSLR Discussion 11 05-16-2008 05:20 PM
Manual focus lens Charles Pentax SLR Lens Discussion 1 01-28-2007 03:14 PM



All times are GMT -7. The time now is 02:21 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