Elmas wrote:JulianY wrote:Elmas,
Nice photo but I see you are breaking rule 6.3.6.6.1 ;)
JY
Hi Julian,
Please outline the rules being broken in the pic. I would like to be warned !
The pistol was in dry-fire mode as my buddy who took the pic made sure the gun was unloaded before he was persuaded to take the pic from that angle !
BTW , I use an Iris Diaphragm on my Knoblochs , and tend to find the increased depth of focus of help in settling in the aiming area.
I am a hypermetrope and the 'weak reading lens' that places the front sight in focus makes the target too fuzzy for my liking... the fuzziness can be unnerving , detracting from one's confidence as it requires plenty of "faith" to just know its there and that I am not straying away as I focus on the sights as the pellet leaves the muzzle. With the diaphragm closed a bit , the target remains sharpish and makes a better "sight picture" .
There was a recent thread where these diaphragms were discussed , and everyone seemed to think that 'depth of field' was a bad side effect and that the main job for the Iris was to limit the amount of light entering the eye causing less strain as the match goes on .
Elmas
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Elmas I am sorry it was a joke rule 6.3.6.6.1 states;
Notices must be displayed to indicate to spectators that mobile phones
must be switched OFF and flash photography is prohibited.
I do concur with slavochk's remarks about the hat;
7.4.7.6 Side Blinders (either or both sides) attached to the hat, cap,
shooting glasses, or to a head band, not exceeding 40 mm deep (A)
are permitted. These blinders must not extend further forward than
to a line from the center of the forehead.
However since the blinders are not in use I see no fault.
Regarding Iris Diaphragm's they are a tool like any other, some people, particularly with eye problems, do benefit from them and some even need them.
Don Noygard's notes read;
Now what about low light? Well, when your natural pupil opens up everything gets "fuzzy" - most importantly, the front sight! And that is where the adjustable iris comes in: you close it until you get the sights sharp and leave the target "fuzzy".
All of which I would agree with. but for my $0.02 his text does not go far enough. Part of the problem with the iris is you are reducing the amount of light reaching you eye which in turn causes the pupil to open and reduces the sharpness of your own vision. so its 2 steps forward one step back. for people with normal eyesight there should be enough light on a range to not need one however not all ranges are equal and some are very dimly lit. For those who's eyesight needs it, it is possible to use the iris to sharpen the target. I would not advocate a sharp target image because it will distract the sight picture and makes it impossible to be sure that the focus is 100% on the foresight, but refining the target from some hazy grey cloud somewhere in the distance to an out of focus circle is of benefit.
Julian