chunky wrote:
Great set of images for IQ evaluation. Thank you very much for your time effort and trouble.

I reckon the Pentax 300 Da will be the one for me.

johnwhit wrote:
The old F 70-210 appears to do really well, I always new it to be a good lens but never tried it with a TC.

John

chunky wrote:
I haven't any experience of the Pentax 300mm lenses but have had quite extensive use of the Sigma 2.8 300mm and the 120-300mm lenses and although they produced excellent results most of the time they were way to heavy to lug about on extended walks to photograph wildlife.
Having switched to Pentax I'm currently using a humble Sigma 70-300 base model and I'm quite impressed.
I will probably look at replacing this lens very shortly but what to get? Mmmmmmm!

dcweather wrote:
After 2-3 years of what I think is steady progress with my wildlife photography I am perhaps losing my obsession with sharpness. I have craved the DA*300mm, hired one and loved it. But to be honest in good light it's not a million miles different to the DAL 55-300 or the Sigma 150-500mm. I doubt the DA*300mm f4 + 1.7 tc will be sharper than either the above but certainly a nicer size than the latter.
I am trying to value composition and interest more than sharpness now.
Dave

m42geo wrote:
get the 2.8 if you can. you need the extra stop to produce sharp images at such focal length

bluenose82 wrote:
Check this link out. This guy uses a K5 and transfers via eye Fi straight to an Ipad2...

link

Ipads are great but do not have inbuilt usb ports. Although you can buy a connector to overcome this.

I personally would go with an Android tablet for true tethering...

Hope this helps.