Ok so I shoot my moms old minolta xg9 its 29 years old but it works. I found this old flash that she had for it too its a nissin 26T it looks like an upside down L and on the back it has settings depending on your range and iso and tells you what aperature is suggested for those certain settings. The only thing is i was experimenting with it but im just not sure what shutter speed to use. Is there a way you guys know what shutter speed is best when using a flash like this or do you just pretty much learn through experimentation over time? Thanks for your help.