I shoot a C Sharps 1-18 twist 34 in badger barrel 45/70 1874 @ our 700 yd range , and starting at 8AM have no problem picking up the 36 inch bullseye till late morning and then it starts disappearing in my Hadley eye cup .Sitting at the bench the sun is on my right shoulder and I start losing it when the sun gets behind me . I then start getting target back with the sun getting west (left shoulder) I have tried black /day glow orange /red /green with no luck .I do use glasses (varilux) and have tried a couple of eye aids but just waste powder @700 (can"t hit what you can"t see but don"t like a good chunk of range time getting wasted ,so wonder what ever other folks do to avoid extended siesta time ? Thanks in advance Ed