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Author Topic: Unidentified Object on big lens  (Read 1686 times)

Dylan777

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Unidentified Object on big lens
« on: April 21, 2014, 06:56:08 PM »
I'm guessing that object helps to line-up smaller target 

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« Last Edit: April 21, 2014, 07:07:17 PM by Dylan777 »

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Unidentified Object on big lens
« on: April 21, 2014, 06:56:08 PM »

Jim Saunders

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Re: Unidentified Object on big lens
« Reply #1 on: April 21, 2014, 07:05:24 PM »
Garden-variety red-dot sight.  They can be had at outdoor places for about $100.  I tried it once, but you need to line yourself up with it so the dot is in the center of the sight; usually this happens automatically when you shoulder a rifle but waving it around in front of you like that doesn't really get you anywhere.

A simple ring and post - or even a short length of tube maybe an inch in diameter would get you more and cost a lot less.

Jim
A good image might fit entirely into the histogram, might not.

neuroanatomist

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Re: Unidentified Object on big lens
« Reply #2 on: April 21, 2014, 08:58:24 PM »
The AoV of a long lens can make it hard to locate a subject in the viewfinder, and a red-dot sight can help.  I got one of these after getting my 600 II, along with a Weaver hotshoe adapter to mount it to the camera.   

It's a little like training wheels - after using it for a while, finding the subject became second nature.

One tip to help, short of a red-dot aid.  When you mount the hood of a supertele, put the mounting screw on top, at 12 o'clock.  Then you can line up the hotshoe and the mounting screw as a crude sight to get you in the ballpark.
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privatebydesign

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Re: Unidentified Object on big lens
« Reply #3 on: April 21, 2014, 09:39:06 PM »

One tip to help, short of a red-dot aid.  When you mount the hood of a supertele, put the mounting screw on top, at 12 o'clock.  Then you can line up the hotshoe and the mounting screw as a crude sight to get you in the ballpark.

That is what I have always done.
Too often we lose sight of the fact that photography is about capturing light, if we have the ability to take control of that light then we grow exponentially as photographers. More often than not the image is not about lens speed, sensor size, DR, MP's or AF, it is about the light.

Old Sarge

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Re: Unidentified Object on big lens
« Reply #4 on: April 22, 2014, 09:48:33 AM »
Looks just like the reflex sight on my AR. Never thought of using one that way.
The Old Sarge

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Re: Unidentified Object on big lens
« Reply #4 on: April 22, 2014, 09:48:33 AM »