500mm lense for a K20D


bigsturgeon

Link Posted 07/02/2012 - 12:33
Hi All
Fairly new to distance photography so I would just like to know if anyone has any idea whether a Samyang 500mm Mirror ED Telephoto Lens f/6.3 would be any good on a K20D. Or can someone suggest another good lense that I could purchase. I am going to Canada in Aug/Sept and I want to try and take good wildlife pictures. Or has anyone got a good long lense for sale, I have 300mm lense and a X2 converter but I don't seem to be able to get a good picture from the combination.
Thanks in advance
Chris

petrochemist

Link Posted 07/02/2012 - 13:02
Hi Chris
Long lenses are generally difficult to use effectively, and good long lenses are ££££.
Sigma do a range of zooms that will take you to 500mm (a 50-500, a 150-500 & a 170-500 IIRC) all out of my price bracket (typically £500-1000) Top quality long Pentax primes, are rare & even more expensive.
Mirror lenses are much lighter to use, and whilst generally not as good as the sigma zooms CAN give reasonable results. (They give donut bokeh if there are out of focus highlights) Depth of field with the f6.3 will be even less than my old f8, and the aperture of mirror lenses can't be changed. In addition mirror lenses are manual focus so this could give you further difficulties if your not used to focusing. At least the K20 has a nice bright viewfinder unlike the K100 I used mine with.

You don't mention which 300mm lens and which teleconverter you've tried.
Many of the converters I've used are worse than just zooming in digitally. Have you tried the 300 on its own?

I assume you've made sure the problem isn't just camera shake - My cheaper tripods couldn't hold a 300mm & TC without sagging. Handheld you want ~1/500s or better...
Mike
.
Pentax:K5ii, K7, K100D, DA18-55, DA10-17, DA55-300, DA50-200, F100-300, F50, DA35 AL, 4* M50, 2* M135, Helicoid extension, Tak 300 f4 (& 6 film bodies)
3rd Party: Bigmos (Sigma 150-500mm OS HSM),2* 28mm, 100mm macro, 28-200 zoom, 35-80 zoom, 80-200 zoom, 80-210 zoom, 300mm M42, 600 mirror, 1000-4000 scope, 50mm M42, enlarger lenses, Sony & micro 4/3 cameras with various PK mounts, Zenit E...
Far to many tele-converters, adapters, project parts & extension tubes etc.

.[size=11:].Flickr• WPF• Panoramio

greynolds999

Link Posted 07/02/2012 - 13:06
As long as you know its limitations, go for the Bigma (Sigma 50-500). It is all you need for wildlife photography.
My Photobucket

Gwyn

Link Posted 07/02/2012 - 13:10
I have a Bigma, and have used it to shoot wildlife in the US. It is a far more useful lens for wildlife than a fixed 500mm is - since you can't predict how close the wildlife may be to you.

A good sturdy tripod, or a beanbag is essential with it though, even with SR.

Oh and before George points it out in his inimitable fashion the singular of lenses is spelled lens, no "e" .

Blythman

Link Posted 07/02/2012 - 13:16
Obviously depends on budget. If you want something cheap and long then get a mirror lens. But understand their limitations. For what its worth I was pleased with many pictures I took with my Tamron SP 500mm mirror lens, and if you go that route, then that is the model I would recommend. Its only available second hand.

I now use a Sigma 150-500 which you should be able to get for £600. Takes some beating for the money in my opinion. Other options are the more expensive Sigma 50-500, or even more expensive a 300mm prime lens like the DA*300mm and teleconvertor
Alan


PPG
Flickr
Last Edited by Blythman on 07/02/2012 - 13:17

bigsturgeon

Link Posted 07/02/2012 - 13:18
Hi Mike
Thanks for such a quick reply. I have a Vivitar MC tele converter, 2X PK-A/R-PK and I use it with a Sigme 70-300mm 1:4-5.6. I have a UV filter on the Sigma, Do I need different settings on the camera that I would have to set manually or should it all work in auto like I have been trying/hoping.
Thanks
Chris

gartmore

Link Posted 07/02/2012 - 13:28
Gwyn wrote:
I have a Bigma, and have used it to shoot wildlife in the US.

What! From the Netherlands?
Ken
“We must avoid however, snapping away, shooting quickly and without thought, overloading ourselves with unnecessary images that clutter our memory and diminish the clarity of the whole.” - Henri Cartier-Bresson -
Last Edited by gartmore on 07/02/2012 - 13:28

gartmore

Link Posted 07/02/2012 - 13:29
A few of us get great results with the Tamron 500 mirror lens, they appear quite regularly on eBay
Ken
“We must avoid however, snapping away, shooting quickly and without thought, overloading ourselves with unnecessary images that clutter our memory and diminish the clarity of the whole.” - Henri Cartier-Bresson -

greynolds999

Link Posted 07/02/2012 - 14:12
gartmore wrote:
Gwyn wrote:
I have a Bigma, and have used it to shoot wildlife in the US.

What! From the Netherlands?

In her defence, Gwyn did say
Quote:
A good sturdy tripod, or a beanbag is essential


My Photobucket

bigsturgeon

Link Posted 07/02/2012 - 14:43
Thanks for all the info guys, don't know if I have done the right thing but I have just bought a Sigma 50-500 for £435.

Thanks
Chris

Gwyn

Link Posted 07/02/2012 - 14:53
gartmore wrote:
Gwyn wrote:
I have a Bigma, and have used it to shoot wildlife in the US.

What! From the Netherlands?

greynolds999 wrote:
gartmore wrote:
Quote:
I have a Bigma, and have used it to shoot wildlife in the US.

What! From the Netherlands?

In her defence, Gwyn did say
Quote:
A good sturdy tripod, or a beanbag is essential


greynolds999

Link Posted 07/02/2012 - 15:07
bigsturgeon wrote:
Thanks for all the info guys, don't know if I have done the right thing but I have just bought a Sigma 50-500 for £435.

Thanks
Chris

The best bit of advice is practice before you go. It is big and takes getting used to. But I have used it successfully hand-held on a K10d.

Don't be afraid to push the ISO if needed. Noise is preferable to camera shake.
My Photobucket
Last Edited by greynolds999 on 07/02/2012 - 15:07

fourfivesix

Link Posted 08/02/2012 - 18:18
Hi I have a Centon 500mm mirror f8 lens up for swaps?

https://www.pentaxuser.com/forum/topic/swap--mirror-lens-33142
flickr
link
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