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Old 01-02-2006, 09:02 PM
Cyberwlf Cyberwlf is offline
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Question FZ20 + TCon14B Focus Issues

Hi everyone

I recently bought a CRing 62mm Adapter + TCon14B Telephoto lens for my FZ20.

When I use it outdoors I seem to have issues getting a solid focus on subject. It appears more like a 'haze' to me than blur (indoor photographs seem to be better though). But I'd really like to get a solid focus on what im photographing outdoors.

Examples of images taken with it here: http://www.psykeout.net/photos/TCon14B/

Thanks for any assistance!

PS. Shots all taken in Program mode
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  #2  
Old 01-03-2006, 07:29 AM
genece genece is offline
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Some of those photos are overexposed and that is causing some of the problem...But you need to understand if there is a haze in the area the 12X of the camera plus the 1.5 X of the lens magnifies the haze by about 12X what you see with you eyes.
Here is an exposure adjustment on one of the photos
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Old 01-03-2006, 07:41 AM
Cyberwlf Cyberwlf is offline
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Thanks for the reply.

Okay so the haze affect can have little done to rectify it?

I have Hoya Double Sided UV Filter + CP Polarizer 62mm Filters, and the UV I suppose may reduce some of it (I've used the UV + TCon14B, but didn't with these particular photos). But overall theres not much more I can do?

The example photos were all quickly taken today, thus all in Program mode with no adjustment of settings (so some shots being overexposed is of little surprise), just so I could provide a basic example of what I noticed in other similar photography I have taken recently since getting my TCon14B.

I have read somewhere that due to limitations of the AF system, the focus point of the TCon14B + combined with 12x Optical of the FZ20 may be beyond the AF's capabilities, and i may need to use the manual focus ring to adjust it. But I've yet to try this properly either to see if this would have much affect on the images.
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Old 01-03-2006, 08:23 AM
genece genece is offline
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Let me say this I have 2 14Bs and they both focus just fine. And I almost never use manual focus...And I have stacked 2 14B's along with a Tcon17 and14b

And let me say this ,and it will start an arguement but I am convinced I am correct.
A UV filter protects the lens of a digital camera and nothing more, it does not reduce haze or UV rays.(It does on a film camera)
Plenty of pro /con feelings about that but most folks I know feel the same way ..but I imagine you are going to hear from those that do not.

I feel a lot of that has to do with the atmosphere one way to check would be to take those photos on an extra clear day.

There are ways to remove haze in PP. Curves is one way unsharpmask with a high radius is another and a multipy layer is yet another.
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Old 01-03-2006, 12:21 PM
rschofield rschofield is offline
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Quote:
Originally Posted by genece
...And I have stacked 2 14B's along with a Tcon17 and 14b
Gene,

When you stack the 14B and 17, which do you attach to the camera and which is out front. I'm interested in trying this on my FZ20, so if you do it differently on each of your collection of FZ's , I'd like to hear about that as well.


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Old 01-03-2006, 12:59 PM
genece genece is offline
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I alway put the strongest lens nearer the camera for the best results, but the 14 B and the regular Tcon 14 work as well either way. And it balances better with the 14B nearer the camera. I think there is a bit more vignetting that way but its not that big a deal.
I try to do them the same on all cameras ...but I do not think there is any thing written in stone , some lenses match up a little different with different cameras..
One thing I did find if you use a couple step rings between the two lenses you can reverse the rings thereby moving the lenses closer together rather than further apart and that helps.
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Old 01-04-2006, 08:01 AM
rschofield rschofield is offline
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Quote:
Originally Posted by genece
I alway put the strongest lens nearer the camera for the best results, but the 14 B and the regular Tcon 14 work as well either way. And it balances better with the 14B nearer the camera.
Thanks, Gene.

I've read that you should put the stronger lens on the camera (as you do) but, to be honest, I was worried about attaching that ton of a 14B on the front of that feather of a 17 which, as you know, has no threads. I've used a pressed-in 77mm multicoated UV filter from the beginning but hadn't epoxied it in nor have I removed the glass. If I were to mount the 14B onto the 17, I wouldn't want that glass there anyway.

I can get a 77-62mm step down ring pretty cheaply to experiment with but I think I'll also look for an inexpensive 86-62mm step down ring to use with my existing 62-55mm thread converter to mount the 17 onto the 14B.


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Old 01-04-2006, 08:15 AM
genece genece is offline
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Yes I do glue the filter minus the glass in the Tcon 17 after I dropped a tcon14.
No damage but I learned a lesson ,I use a silicone sealant / adhesive available at auto parts stores, which can later be removed if necessary.
Also its black so its hard to see.

Do not overlook the advantage of using 2 step ring where one would work its hard to explain but if you had the rings in your hands you would see how you can reverse them to get the 2 lens closer together.

Like with the Tcon 17 go from 77 to 72 to 62, put the rings together backwards and the 14B will be very close to the 17.
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Old 01-05-2006, 01:36 PM
WildWinds WildWinds is offline
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I tested your theory Gene on a clear day with no clouds. I took two images, taking one with a UV filter and taking another without a UV filter.

The image '441' is with a UV filter. '443' is without a UV filter.
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  #10  
Old 01-05-2006, 01:48 PM
genece genece is offline
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They look similar to me what is your conclusion?
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