i ask since i am and encountered a problem because of it this week
switched from a thick white dacron string to a thinner black fastflight one this week and my string picture has now gone all to hell (indoors at least)
with changing my bow setup ive also moved my string alignment a fair way from the right hand edge of my riser (RH archer) to the RH edge of my sight ring
being long sighted i cant focus on things close up (zoe is always moaning at me about how dirty my glasses are but i cant focus on the lenses so never see the grime) and noticed shooting indoors last night that i just couldnt see the new black string when anchored other than as a vague and very faint wide blur
this obviously ballsed up my string picture (if you cant see it you cant align it with anything) and i was shooting pretty poorly - id set the bow up outdoors and in natural light didnt have much a problem with string picture shooting 2 unoffical frostbite PBs on the trot that morning
indoors i found myself either focussing really hard on the string enough to get some sort of alignment but then i was totally not seeing the target or focussing on the target and pretty much guessing which bit of the grey blur was actually the string (the latter was marginally more successful but neither were ideal)
see how it goes outdoors tomorrow morning again and ive already ordered another lighter coloured fastflight string assuming its the colour and not the narrower string thats the problem
so finally to the question
if a lighter string doesnt sort this out do any other long sighted archers have a similar problem and if so how do you get round it ?
slainte

rob