The Pro Ghrono is a good one. I have had three different brands. The shooting ghrony was one brand. I don't recall the first one but it used the old paper screens. The Shooting Chrony worked well but the Pro Chrony is much less fussy about light conditions and such. Mine was about 120.00 but I have had it for about ten years so I don't know what they cost now.

www.competitionelectronics.com Mine is the ProChrono ditgital. 119.00