Pentaxophile

Joined: 6th May 2009

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Pentaxophile
Just watched Human Planet, another fantastic episode ... wonderful how some people live in harmony with nature. Like the living bridges of Meghalaya link Wanna go there! Weather sealing will come in handy by the look of it...

Comment by Pentaxophile posted on Another pointless thread at 24/02/2011 - 21:22

Pentaxophile
Quote:
Perhaps the most disturbing revelation is this. The US Air Force has been tendering for companies to supply it with persona management software, which will perform the following tasks:

a. Create "10 personas per user, replete with background, history, supporting details, and cyber presences that are technically, culturally and geographically consistent … Personas must be able to appear to originate in nearly any part of the world and can interact through conventional online services and social media platforms."

b. Automatically provide its astroturfers with "randomly selected IP addresses through which they can access the internet" (an IP address is the number which identifies someone's computer), and these are to be changed every day, "hiding the existence of the operation". The software should also mix up the astroturfers' web traffic with "traffic from multitudes of users from outside the organisation. This traffic blending provides excellent cover and powerful deniability."

c. Create "static IP addresses" for each persona, enabling different astroturfers "to look like the same person over time". It should also allow "organisations that frequent same site/service often to easily switch IP addresses to look like ordinary users as opposed to one organisation."
This is rather alarming.... there have been a few reasonably convincing copy'n'paste marketeers on here who are promoting links to web stores, or promoting certain brands. But this looks more sophisticated.

Rather scary that the military is getting involved!

Makes you wonder whether any of this might be used (or be being used?) to 'spike' political foment in certain countries...

Comment by Pentaxophile posted on Robo-Troll at 24/02/2011 - 21:14

Pentaxophile
Pentax flagships have often fallen between the Canikon midrange and top APSC models, so it's easy for reviewers to say they're either too expensive, or not as good, depending on the comparison....

Comment by Pentaxophile posted on Amateur Photographer at 24/02/2011 - 14:06

Pentaxophile
Just to confuse you further, have you considered the Pentax DFA 50mm f2.8 macro? It is supposed to be tremendous, and would open up proper macro work to you.

Comment by Pentaxophile posted on Sigma 50f1.4 vs Pentax 40f2.8 at 24/02/2011 - 11:21

Pentaxophile
I will agree that the 16-45mm is a good performer. I am expecting better overall sharpness from the Tamron though, if not quite so good colour. A shoot-out is on the cards, and at the same time I'll bottom out whether my DA16-45 has decentring issues at 16mm, which the wobbly extended lens barrel may be contributing to.

Comment by Pentaxophile posted on Why is the Tamron 17-50 F2.8 not more popular? at 24/02/2011 - 11:13

Pentaxophile
Because I tend to use wide zooms at the widest angle setting the most. I don't like walking around with the barrel extended as it seems more vulnerable and makes the camera feel less nicely balanced. Even if I used it in the 35-45mm range more often, it makes sense to start off wide and zoom in, than vice versa.

It wouldn't be an issue if the 16-45mm only extended a cm or two, but it goes out quite a long way. Its a minor thing, but it does bug me ever so slightly.

Comment by Pentaxophile posted on Why is the Tamron 17-50 F2.8 not more popular? at 24/02/2011 - 11:01

Pentaxophile
Just received mine from Snootchies... I'm very pleased to see it's a noticeably smaller than the DA16-45mm, and the lens barrel seems less wobbly when extended. Plus it extends as you zoom IN, which is better.

Comment by Pentaxophile posted on Why is the Tamron 17-50 F2.8 not more popular? at 24/02/2011 - 10:47

Pentaxophile
Item received, thanks Bob.

Comment by Pentaxophile posted on FS: Tamron 17-50mm f/2.8 £200 with 3 month warranty OR swap for 18-250 at 24/02/2011 - 10:38

Pentaxophile
My impression is that a lot of people think very highly of the Tamron 17-50, especially on the other forum it seems to be the 'consensus choice' for a standard zoom. Hopefully tomorrow I'll get to try one for myself

Comment by Pentaxophile posted on Why is the Tamron 17-50 F2.8 not more popular? at 23/02/2011 - 23:11

Pentaxophile
This is the f3.8-f4 one? It's big, clunky, but seems pretty sharp to me.

Wide open at 200mm/f4:
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Can't remember the settings on this. possibly f5.6:
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The only thing that puts me off using this lens more is the size and weight! So I just use it with a PK adapter (not the more expensive PKA ones - which are temperamental anyway!) Someone had one for a tenner on here recently...

Comment by Pentaxophile posted on Tamron Adaptall 2 70-210 zoom (46A) at 23/02/2011 - 20:00

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