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Old July 8th, 2008, 03:06 PM   #1
John Carrithers
New Boot
 
Join Date: Jul 2006
Location: United States
Posts: 15
Letus 35 focus...a dead horse

I may be out of my mind, but I feel like I should be getting better focus with my EX1, Letus Extreme and nikon lenses. Here's what I have done:

Adjusted the ground glass to 7.5mm using a caliper
Adjusted the back focus screws until a Siemens chart was "in focus" at 4ft with the focus ring was adjusted to 4ft on an 85mm nikkor lens

I feel like objects within a relative close distance seem very sharp. Everything beyond 4-6 feet seems to be less sharp. I may be expecting too much from this setup or maybe I have no idea what I'm doing. Either way I would appreciate some input.

I've posted some frames exported from FCP if my Siemens chart test here below.
Lenses used: 28mm, 55mm micro, 85mm and a 105mm

Another focus question- If I zoom my EX1 all the way into the ground glass of the Letus should "in-focus" objects appear sharp. While I was doing the Siemens test today a swung the camera around to shot an oak tree out side. I believe I had the 85mm on. I zoomed all the way into the ground glass and racked the focus ring back and forth and could find a point where the branches looked sharp.


I know this has been covered a lot on various forums and believe me I've read through many of them. I just feel like I"m missing something. Any help would be greatly appreciated.

Thanks,
John
Attached Thumbnails
letus-35-focus-dead-horse-28-mm-chart-ws.jpg   letus-35-focus-dead-horse-28-mm-hand-ws.jpg  

letus-35-focus-dead-horse-55mm-chart-ws.jpg   letus-35-focus-dead-horse-55mm-hand-ws.jpg  

letus-35-focus-dead-horse-85mm-chart-ws.jpg   letus-35-focus-dead-horse-105mm-chart-ws.jpg  

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