Originally posted by nanhi awscreo Sir, your choice of a 2x TC for your Tamron 70-200 mm lens for the intended subject is perfect. Also shooting for an eclipse requires manual focusing. So I suggest go to the nearest Mom & Pop Stores and try out a few 2x TCs in the Stores for sharpness.
The one near my house in the Bay Area - Kaufmann Cameras - has some 20 to 30 of them for $ 5 to 12. Some known and unknown Brands are darn good.
I have the Pentax F 1.7x AF Converter - between 2x & 1.4x - and is a very good Made in Japan piece. Plus I also have the Vivitar "A" 2x Macro TC, another decent one. Picked up brand new for $ 15 from a Pawn Broker in the Bay Area.
Is there one you can suggest to me?I am totally new to converters, I thought there isn't one for Pentax ff, but I'm guessing that only applies to the af, and manual converters are available from multiple manufacturers? That's be great, manual focus is fine with me for the purpose. Are there any nicer ones out there that keep some of the sharpness? I'm happy that I don't have to buy a long telephoto in the end, I was considering picking up a vintage 400mm for the eclipse
---------- Post added 08-06-17 at 09:07 PM ----------
Originally posted by rawr IMHO, just shooting crop mode with the K-1 would probably be a good option for that subject and lens. 105-300mm f4 on-demand.
I like it for general shooting, but for the eclipse j want as much reach as I can achieve. So a X2 converter plus a crop mode should give me 600mm, should be sufficient))
I found a vivitar series 1 x2 converter for about 100-120$, is it a good model?