Return to Index  

pupil dilation changes the depth of focus (makes it shallower) but

October 8 2011 at 10:10 AM

bill price in VA  (Login -bp)

Response to Re: POI shift revisited-long

doesn't change the POA. this is related to what people see when focusing and trying to rangefind in a dark situation, as opposed to a bright target. bright target gives you smaller pupils and that gives you a shallower depth of field--that means that your target appears to be "in focus" at a greater range of distance (say 30-38 yards) rather than a shorter range of distance (say 30-34 yards) in a brighter situation.

giant spotlights would help rangefind. they're not prohibited, but would be an example of bad sportsmanship


 Respond to this message   

On line trajectory calc by Brad Troyer MILDOTS


JK's Airgun Forums, moderators, and administrators are not responsible for any problems that may occur from reading or using content posted on this forum, as they are the exclusive responsibility of two parties: the person who posted it and the person who acted on said posted information. Use of our forums by people under 18 years old is allowed only with legal guardian(s) present.


When you signed up you agreed to All N54 Rules. 1-No Flaming or name calling. No personal attacks, racial slurs, foul language, insults or trolling. This is cause for post deletion and/or banning. 2-Instigating with the purpose of drawing people into highly argumentative situations and wasting of bandwidth is cause for post deletion and/or banning. 3-Do NOT comment on Forum Moderation. It is what it is, live with it or leave. This is an immediate 30 day ban. 4-If you feel wronged email 5- Keep this FT forum civil and behave in a socially acceptable manner. 6- The primary purpose of this FT forum is the discussion of field target; however, the buying and selling of field target gear and rifles is permitted between forum users pursuant to the same rules as the Yellow Classifieds and the user assumes all responsibility for the transaction. Non-sponsoring dealer sales are not allowed. To keep the forum clean of ads and pursuant to the intent of the FT forum, WTB and FS ads are subject to deletion by the forum moderator once they fall off of the first page.