I've spent so many hours [days] looking at & reading about lenses.My eyes are crossed & I feel like my brain has become mush.I will probably feel silly at a later point for having to ask.But,I feel like I'm not seeing what's right in front of me at this point. LOL
Please help me.What is the differences between the following lenses?
1. Pentax SMC P FA J-Telephoto 75-300mm F/4.5-5.8 AL
2.Pentax DA 55-300mm F/4-5.8 ED
Any experience or feedback on these lenses? They seem rather cheap [price]. Can these be used with a teleconverter? Is there a certain kind that I would need with them?
Are these pretty slow lenses?
Is there another lense that would be better? I need something with some reach.
I have a Asahi Pentax K1000 & Pentax K10.Will these lenses work with my cameras?
Please be kind.
Cathy