I've had a 35x Comp for a few years now & I've never had any POI shift in temperature, the parallax focus does change slghtly in temperature extremes but it is very predictable.
I agree Rob......a slight change to a rifle and a slight change to scope can really add up when they're put together.
I think that the Comp does vary slightly with light/dark conditions but i have to say that i never noticed that...only the POI change due to temp. It looks as if it's the same old thing again.....some are affected more than others
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I've had a 35x Comp for a few years now & I've never had any POI shift in temperature, the parallax focus does change slghtly in temperature extremes but it is very predictable.
I have to agree with the previous comments on this one - I have never experienced POI with any of the ones I have had, and the once I thought I might have had a problem, it turned out to be the rifle in the end - POI is generally the fault of the rifle, not the scope - I think this is most pertinent in this case
LeeH
Please tear carefully along the perforation.
I borrowed a x40 mag for a couple of months and found it faultless except for one shoot on an open field where the sun baked myself and the kit to a crisp. That was the only time I ever noticed a major rangefinding variation. POI was unchanged, just that I was ranging 55yds at 60yds etc.
Colin, just as an aside on the particular day you mention was it also glaringly bright light conditions as well?
Since I opted for transition lenses in my specs POI shift has become negligible Chris. I think that parallaxing errors may be down to the pupils dilating and contracting thus altering the perceived depth of field and thus the range shown on the side wheel. I test my 55 yard setting at the start of each shoot and have had absolutely no trouble with POI shift or parallax shift. The Competition series scopes are the least affected by temperature that I have used apart from the Burris 8-32x44 R/A.