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Bigma or DA 300 with TCs ?

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**** eduard said:
See this thread and the reaction of Karen

http://forums.dpreview.com/forums/read.asp?forum=1036&message=27423492

Is a crop of the F/FA 300 (DA) equal of better than the Bigma? If so
than the DA 300 or even the Sigma 100-300 f4 is a better choise.

What's your opinion/advice?

regards

****
Click to expand...
First you'll need a Tamron TC to keep the SDM if you buy the DA*, which is pretty hard to find those days, or you'll have to wait for the new Pentax TC to come... Since it is only f/4 you might lose the auto-focus with a TC.

Second, I think a prime lens (especially the DA 300mm) will always be better than any zoom, moreover, the bigma is pretty soft at the long end.

I know it's not the same budget but have you thought about waiting for a HSM version of the Sigma EX DG 500mm f/4.5? This is what I'm gonna do. I need a tele, I'll buy first the DA* 300mm and will sell it when the 500mm HSM comes out.

--
Cheers,
Ed
-----------
http://www.flickr.com/photos/7896467@N07/

 
That's what I need to decide. After the pics on the Norwegian site, the Bigma was it for the 95& but Karen makes me a little scared if that's the right choise. I hope the DA 300 will be there soon so I can give it a try.

regards

****
can_ka_no_rey said:
Oops, I just read your other post, you have the Tamron TC, which is
good news for the DA* 300mm ;o)
--
Cheers,
Ed
-----------
http://www.flickr.com/photos/7896467@N07/

Click to expand...
 
Obviously just my opinion. I would look at all the images posted and decide. I chose the sigma 100-300 F4/sigma 1.4TC and only recieved it last week, haven't shot with yet, but planning to vist the zoo soon and will know better. But, I am keeping the option of trading it in for the DA* 300, but no one knows what the IQ of the 300 is (I know it's a prime).

Tough decision I know.

--

'Life is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming... 'Wow! What a ride!'

 
I pretty much have the same question. I always find my DA50-200 at 200mm to be a bit slow (f5.6) during the Winter months (overcast/rain everyday) and find myself attracted to the DA300 or Sigma 100-300 more because of their f4 aperture than their max focal length.

--
Roger
 
Hi pcarfan,

I like to hear your opinion about the 100-300 +TC. The most important thing is the quality of the pic. When a crop is better than the 50-500 at 500 than is the choise easy.

Post some pics next week if you will?

****
pcarfan said:
Obviously just my opinion. I would look at all the images posted and
decide. I chose the sigma 100-300 F4/sigma 1.4TC and only recieved it
last week, haven't shot with yet, but planning to vist the zoo soon
and will know better. But, I am keeping the option of trading it in
for the DA* 300, but no one knows what the IQ of the 300 is (I know
it's a prime).

Tough decision I know.

--

'Life is not a journey to the grave with the intention of arriving
safely in a pretty and well-preserved body, but rather to skid in
broadside, thoroughly used up, totally worn out, and loudly
proclaiming... 'Wow! What a ride!'

Click to expand...
 
Alfisti,

Your right about that but............. if a crop from the F/FA/DA 300 is the same or better than the Bigma at 500 , than the choise is easy. Bur I am not so sure about that. In the other thread Karen said that a crop from the F/FA 300 is better than the Bigma at 500. I wonder if it was the weight/handling or the quality of the lens.
Soon I have to make a choise.

****

PS By the way it is just a luxeryproblem so it is no problem at all.
Alfisti said:
If you do then it's the bigma IMHO.

300x1.4 equals 420mm at 5.6 which is 1/3rd of a stop faster than the
bigma but 80mm short and once you add the TC i'd imagine the IQ to be
comparable.

--
***********************************************
Please visit my gallery at http://www.pbase.com/alfisti

Pentax Lens examples at http://www.pbase.com/alfisti/images_by_lens

Updated February '08
Click to expand...
 
Same quistion and intrest here. If I want to make the pictures I dream of, I have to invest in long glass. But my budget is small and my dreams are big. I will follow this for information.
--
Harrie
 
Some thoughts

a DA* 300 on K10D/K20D - should be a weather sealed combination and SDM

Bigma more flexible but heavier. Shops seem to be sold out of/low on stock atm - and at least one is suggesting a new version of Bigma - so I wonder if Sigma have tweaked design

--
J.
 
No way in the world it's going to be even close. You need GOBS of pixels to make up for the loss of optical length. Just not gonna happen.
**** eduard said:
Your right about that but............. if a crop from the F/FA/DA 300
is the same or better than the Bigma at 500 , than the choise is
easy. Bur I am not so sure about that. In the other thread Karen said
that a crop from the F/FA 300 is better than the Bigma at 500. I
wonder if it was the weight/handling or the quality of the lens.
Soon I have to make a choise.

****

PS By the way it is just a luxeryproblem so it is no problem at all.
Alfisti said:
If you do then it's the bigma IMHO.

300x1.4 equals 420mm at 5.6 which is 1/3rd of a stop faster than the
bigma but 80mm short and once you add the TC i'd imagine the IQ to be
comparable.

--
***********************************************
Please visit my gallery at http://www.pbase.com/alfisti

Pentax Lens examples at http://www.pbase.com/alfisti/images_by_lens

Updated February '08
Click to expand...
Click to expand...
--
***********************************************
Please visit my gallery at http://www.pbase.com/alfisti

Pentax Lens examples at http://www.pbase.com/alfisti/images_by_lens

Updated February '08
 
**** eduard said:
See this thread and the reaction of Karen

http://forums.dpreview.com/forums/read.asp?forum=1036&message=27423492

Is a crop of the F/FA 300 (DA) equal of better than the Bigma? If so
than the DA 300 or even the Sigma 100-300 f4 is a better choise.

What's your opinion/advice?
Click to expand...
For a start, wait till the DA300 comes out, so we can see how good it is.
Should be soon.

Also of interest is the 150-500 sig, which will come out.. when?

RE: TC. I expect you 1.4x will work with the DA.

I don't know about Karins claims. I'd like to see a demo post!

--
cheers!

Gunn

-- Get a big lens and get closer™.

http://www.dpreview.pentaxistDS.photoshare.co.nz
http://www.y3m.net/penwik/pmwiki.php/Main/PentaxLensWiki
FAQ: http://www.pentaxuser.org/tiki-index.php

 
All things being equal the 300/4 would need to resolve 40% more detail than the Bigma by my math.

Can't see it happening.
fototim said:
Alfisti said:
No way in the world it's going to be even close. You need GOBS of
pixels to make up for the loss of optical length. Just not gonna
happen.
Click to expand...
IMHO this conclusion is a bit too blunt.
IQ is more simple resolution. You can't make a valid conclusion based
on pixels (read resolution) alone.

--
Fototim
Click to expand...
--
***********************************************
Please visit my gallery at http://www.pbase.com/alfisti

Pentax Lens examples at http://www.pbase.com/alfisti/images_by_lens

Updated February '08
 
On reflection my maths are wrong, you'd lose way more than that as you need the square of the optical zoom in pixels.

Not gonna happen.
Alfisti said:
Can't see it happening.
fototim said:
Alfisti said:
No way in the world it's going to be even close. You need GOBS of
pixels to make up for the loss of optical length. Just not gonna
happen.
Click to expand...
IMHO this conclusion is a bit too blunt.
IQ is more simple resolution. You can't make a valid conclusion based
on pixels (read resolution) alone.

--
Fototim
Click to expand...
--
***********************************************
Please visit my gallery at http://www.pbase.com/alfisti

Pentax Lens examples at http://www.pbase.com/alfisti/images_by_lens

Updated February '08
Click to expand...
--
***********************************************
Please visit my gallery at http://www.pbase.com/alfisti

Pentax Lens examples at http://www.pbase.com/alfisti/images_by_lens

Updated February '08
 
Well...I have Pentax F* 300mm f4.5. I also have Tamron adaptall-2 PKA adapter and Pentax 1.7X AF-teleconverter.

Tomorrow I will catch Tamron SP 300mm f2.8 LD-IF (modell 360B).

Do you think that combo (Tamron + 1,7x) will be better than
1.) combo Pentax F* 300mm and 1.7X?
2.) Bigma?

At least in the paper Tamron combo looks quite nice (510mm f4,76)....
 
Ok a 300/2.8 is another story. Big $$$$ though.
Finnish Flash said:
Well...I have Pentax F* 300mm f4.5. I also have Tamron adaptall-2 PKA
adapter and Pentax 1.7X AF-teleconverter.

Tomorrow I will catch Tamron SP 300mm f2.8 LD-IF (modell 360B).

Do you think that combo (Tamron + 1,7x) will be better than
1.) combo Pentax F* 300mm and 1.7X?
2.) Bigma?

At least in the paper Tamron combo looks quite nice (510mm f4,76)....
Click to expand...
--
***********************************************
Please visit my gallery at http://www.pbase.com/alfisti

Pentax Lens examples at http://www.pbase.com/alfisti/images_by_lens

Updated February '08
 
There was a typo in my post. Sorry about that.
The first sentense should be: IQ is more than simple resolution.
---

The DA* 300 is f:4 and Bigma is f:6,3 at 500mm. This means that in real life, you often need to shoot wide open with the Bigma, with the DA* you can step down to the sweet spot of the lens under same light conditions.

And that's just one factor that makes this more complicated than judging from resolution alone. The significant weight of the Bigma is another. The DA* is lighter. So it is a lot easier to make the pictures sharp.
I think I'll stop there.

I'm not saying the a crop from the DA*, will give better results than the Bigma. I'm just keeping an open mind :-)
--
Fototim
 
Tamron surely costs some money. But it's a MF-lens, and used.

I would say that you need to pay same amount from F* 300mm f4.5 (and DA* 300mm f4) or even more. Despite of fact that you can not see this black Tamron 360B (last & best model of MF Tamron 300mm f2.8 lenses) in sale very often.

At least it went like that in my case.
 
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