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Old Feb 1, 2010, 4:39 PM   #1
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Default LBA rearing its ugly head again!!!

ok so i went on a wildlife shoot and kept thinking i could use a faster telephoto lens - dont get me wrong the sigma 150-500 is fantastic for reach but were afew occasions when i wanted a faster aperture setting

were afew times i wished for the 50-500 too but tahts because i was lazy and didn't want to start switching lens while hiking around a wildlife park

now i swore that my pentax 12-24mm was gonna be my last lens for a long while but apparently i have the restraint of a dog on an involuntary diet, so what would people recomend?

my first thoughts were a nice pentax da* prime - but the 300 is only and f4 and the 200 is a f2.8 but is 200mm enough? and combining them with a 1.4 and a 2x teleconverter brings both of them up to f5.6 into the territory of my sigma

are there any good 300mm f2.8's out there for pentax mount? any fast telephoto zooms?

preferably would like a lens with some form of sdm/hsm or whatever the particular lens maker calls it - F2.8 aperture and all for less than 1000

(you know its scary how my camera is eating all my cash gonna go hungry soon for the want of a new shiny lens)
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Old Feb 2, 2010, 3:48 PM   #2
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There are the Pentax FA* 300mm 2.8 (AF, no SDM), Tamron 300mm 2.8 (MF), a Sigma 300mm 2.8 I think you can find in Pentax mount (seldom heard of). All of these on the second hand market, all of them will make you go hungry for quite some time. Especially the FA* lens, which is no doubt the best of them. The forum expert on 300mm 2.8 lenses is Scott/Snostorm

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Old Feb 2, 2010, 7:22 PM   #3
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oh dear - fa* 300 gonna haunt me now - got this voice in my heard saying I WANT I WANT I WANT!!!!! - but my wallet is shaking its head and a grim look of no chance in hell matey on its face - and lucky for my wallet i can just order one with one click on amazon for this thing

however the sigma is easily obtainable for about 2200 and seems to still get great views even if not quite as good as the fa*

will need to think this one through carefully and see how much cash i can scrape together
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Old Feb 2, 2010, 11:19 PM   #4
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As much as I'd like to match the pictures taken by a couple of people around here with their 300 f2.8 lenses - they come with some significant disadvantages. They are huge! I've been using the DA*300 now for a while. It's an awesome lens, but it's heavy and large - I had to buy a new, larger bag just so I could carry it around. I sometimes struggle with it hand-held, so I can't imagine using something like a 2.8 or a longer lens on a regular basis.
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Old Feb 3, 2010, 12:35 AM   #5
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The FA* is the one if you want quality...I own the Bigma (Sigma 50-500) and it does allow you to tote fewer lenses. With the 18-55 Kit lens and the Bigma you are covered from 18mm all the way to 500mm. Still and all the Sigma 300mm f/2.8 or the FA* 300 f/2.8 will give better quality of photo and image..(IQ). Just a Tad sharper and more contrasty without PP. I'm saving up for either a FA* 250-600mm f/5.6 or a FA* 600mm f/4......Well that is my intent but I keep getting side tracked into looking at the 300mm f/2.8's out there. With a high quality TC I would be as fast as the 600mm FA* without the actual cost of one. So I will probably scale back my wants and get the FA* 300mm instead.....But then I will still want a longer one won't I.....Oh decisions decisions...

As to weight the Sigma 50-500 weighs..1,840g/64.9 oz.
The Sigma 150-500 weighs...1910g / 67.4 oz. I guess the HSM makes it heavier.
The FA*300mm f/2.8 weighs...2495 g/ 88.0 oz.
The Sigma 300 f/2.8 weighs...2400gr/84.6oz

That weight over a full day will make a difference. especially considering you will probably have to carry a heavy duty tripod as well. I know I could hand hold one but that kind of weight is better rested on a tripod.

Now if you are willing to sacrifice some speed but get decent (I mean really decent quality ) in a hand holdable 300mm lens then look for a used FA* 300mm f/4.5 lens.
This lens weighs in at...935 g / 32.96 oz. or about half what your 150-500 or my Bigma weighs.

Something to think about isn't it?
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Old Feb 3, 2010, 8:19 PM   #6
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fiar bit of extra weight - the sigma 300 would be the easiest option and seems like a reasonble one too (would hope so for 2200) - might look at the da*300mm f4 again though

but maybe i should jsut contain my lba this time round - its alot of cash and have to ask would the extra speed be worth it - sigma 150-500 is pretty good afterall
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Old Feb 5, 2010, 5:46 AM   #7
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Quote:
Originally Posted by John.Pattullo View Post
fiar bit of extra weight - the sigma 300 would be the easiest option and seems like a reasonble one too (would hope so for 2200) - might look at the da*300mm f4 again though

but maybe i should jsut contain my lba this time round - its alot of cash and have to ask would the extra speed be worth it - sigma 150-500 is pretty good afterall
There is a marked difference in IQ between the Sigma offerings and the FA* lenses so I'm assuming the difference is there in the DA* ones as well. A little sharper and better contrast. The coatings make all the difference. Now don't get me wrong...I love my 50-500mm Sigma lens but a high end prime lens with Pentax's coatings would out do it every time given the same focal length and camera. JMO
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Old Feb 5, 2010, 11:31 PM   #8
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Here is a cure for your LBA...

http://www.bhphotovideo.com/c/product/382169-USA/Sigma_195109_300mm_f_2_8_EX_DG.html

then if that does not fix it, you may need to switch to Canon for this little guy...

http://www.youtube.com/watch?v=IRq18WpQZC0

... just what you need for a day of birding, although you may need a new tripod...

Last edited by interested_observer; Feb 5, 2010 at 11:43 PM.
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Old Feb 7, 2010, 5:01 PM   #9
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IO, that Canon lens is, um, really something. The lucky new owner would need not only a new tripod, but a custom-made photo backpack, since I don't think there are any photo bags on the market that could easily carry that little beauty.

But talk about slow, that think is f/14! C'mon Canon -- that baby should have been f/4 at least, and f/2.8 would be even better. Just imagine the size of the front element!
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Old Feb 11, 2010, 4:25 PM   #10
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that canon is a mirror lens from the looks of it so will do without it =) the donut bokeh is distracting!! =)

as an update i have begun saving for the da* 300 f4 - i've descided not to bankrupt myself right now though and will just put some money away over next few months as i dont think there is any urgent need for it i just want it =)

the fa* 300 f2.8 well sadly its not manuactured anymore and not sure where in the uk could get one even if i could afford it which i probably cant anyway =) so perhaps its not bad thing that i cant get one
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