There are other factors like what do you plan to use to fill the softbox with ? Though in most cases a 80 or 90cm softbox will be sufficient.

Well I stuck with Pentax in the end.. As I have a few lenses and i'm now the proud owner of a K1.. Back onside as they say...lol So I need to find a wide angled lens again.

The grip on the K1 makes it a hefty and heavy camera. Especially with a Tamron 70-200.. Ive just got a grip free with my K1 from SRS. but for me it gives little advantage. when you consider it only takes a few seconds to exchange the battery. yes, before you all get at me...The added shutter button in portrait mode is a plus...

From the Kenko webpage....

Full AF operation with the TELEPLUS MC4 AF 1.4X and the MC7 AF 2.0X DG is possible using a camera lens with an open aperture of F4 or brighter while the 2.0X DG would require an open aperture of F2.8 or brighter. Please be aware that AF will work properly only if there is enough light and contrast on the subject to activate the camera's AF sensors properly. (Manual focusing may be necessary when using lenses with smaller open f-stop values than those given above.)

I have a Kenko Teleplus 2X MC7.. i just tried it with a Pentax 50mm f1.4 on my K5II or K1. Non would auto focus.. But it it a little dark right now.. Worked perfectly though manually focusing..

hi there...Welcome to the mad house...

Obviously not in a garden in Atherton UK.. Nice capture...

Hope it was nothing faster than cows or sheep then....lol

admiring number 3 a great deal....

Nice images..

Nice work Gareth...Love the two fishermen....