jospan
If the 70-210 is the F version it will be worth getting hold of they can sell from 100quid and more and if the vivitar 105 is the series one as George says its a very good lens from what i have read, Its not AF though. 2 of these sold on E-bay over the last week and they went for over 150quid each.
The K110 is the same basically as the K100D but without the shake reduction.
If you can squeeze him on the price a bit more you might be on a winner.
Let us now how you go with it.

Well i checked the voltages of my 3 batteries, But not under load as pentaxian450 suggests. And i came up with 3 different results.
The Pentax original was fully charged and was at 7.7
The first of my NP 400s was the one in the grip and currently being used so its not fully charged and it was 6.9
The second of my NP 400s was fully charged and it was 8.0
I wasn't sure what to make of it, so i asked the electrical engineer at work and he re-tested them and said it was normal to get these types of readings on batteries and they would be fine to use

I have 2 of them and been using them for a while without any noticable problems. But i will test the voltage on them and get back too you.


Have you tested the Pentax original to see what its putting out :

I have tested cordless drills in the past and found the voltage is always higher when fully charged and then drops a few volts as the battery depletes (food for thought)

hmmm sign language i like it :

This is the kit i use when i'm bashing through the bush looking for potential victims.
All attached to my monopod

In terms of optical range and quality i have to agree George but in terms of overall dimensions on that canon beast it would take some beating and price for that matter

Wonder how that Pentax will look in my Sig.

Check out this baby.
You could buy 2 of them and tape them together and make a great pair of binoculars

http://www.bhphotovideo.com/c/product/800557508-USE/Canon_2527A001_Super_Telephoto_1200mm_f_5_6L.html

Keep an eye out for a sigma 400mm, the AF version if you can get it. There are several members here who have them and it would be well inside your budget.
Or you could go for a Bigma 50-500mm. You would need all that budget with this baby.

Thanks Dan, Great explanation of it . I love it when i am shooting open the throttle

Its about 2inches in length

Let me know if you find anything about it, I would be interested too know