If you are looking for suggestions about which manufacturer, here are some that I have had personal experience with. Leupold varilux series- great price on the lower high end quality. Bushnell elite- excellent scope in my opinion, some models like the 4200 come in firefly reticle, also along the lines of leupold but it has better fog protection. The ones I described are 249-300.00 range. I once went crazy and spent my money on a zeiss conquest before my eyesight went south. It was a high end optic, and I can honestly say you get what you pay for. The only advantage I could tell from my bushnell was the long distance focus was so crisp you make out a animal at that blue light moment. It wasn't like looking at a form, you could see the crisp outline. The key to all optics in the dusk dawn isn't the price,or the name, it's the light transmission. Fully multi coated optics are supposed to gather more light and reduce stray light causing the blurr. The key to transmission is the quality of the glass. The higher the transmission the clearer the scope. I think leupold and the bushnell elite is 95% light transmission. The zeiss was 98% I THINK. I dont have the scope or paperwork anymore. It ultimately comes down to budget, need, and useability. Research all of the optics in your price range and choose one that will meet all of your needs, is nitrogen filled, has fully multi coated lenses, and preferably a one piece tube with a warranty. -Les