Glasses or not ......

To: Lyn Saint <>
Subject: Glasses or not ......
From: Peter Shute <>
Date: Sat, 16 Jul 2016 06:08:26 +0000
I just wear my glasses. If you can't tell if it's focused with your glasses on, 
does that mean you need new glasses? Also make sure you're looking through the 
middle of your glasses, as the edges may cause distortions.

Looking through a viewfinder with glasses on is annoying because you can't see 
the edge of the frame, but if you need them to see birds, what choice do you 

I've added a 1.3x viewfinder magnifier, which helps with manual focusing, but 
makes it even harder to see the edges.

Peter Shute

Sent from my iPad

> On 16 Jul 2016, at 1:18 PM, Lyn Saint <> wrote:
> Hi Everyone,
> I have a bit of a quandary at the moment. I have acquired a Sigma 100-400
> mm lens for my Canon 7D and often find it difficult to determine if the
> bird is in focus or not. I can't see clearly enough through the lens.
> I have glasses but have also purchased and am using a dioptric adjustment.
> This is good but annoying as I need to have my glasses on to find the bird
> and then have to whip them off to focus though the lens.
> For those of you who have this issue with glasses, do you have any advise
> on this issue?
> Frustrated,
> Lyn
> <HR>
> <BR> Birding-Aus mailing list
> <BR> 
> <BR> To change settings or unsubscribe visit:
> <BR>
> </HR>

<BR> Birding-Aus mailing list
<BR> To change settings or unsubscribe visit:

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the birding-aus mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU