"It's all about the glass". Show me examples please
It might be possible to show different bokeh and resistance to flare though.
I'll have a look, but am not sure that I have much material shot in the way you ask.
Best regards, John
However, I bought a Pentax 50mm f1.7 off a member here. It is a cracking lens. Even with my limited skills I could "feel" the difference, so I can understand how better glass makes a huge difference.
Which reminds me: I just don't use that lens enough!
Getting there! Thanks to you guys

Pentax K10d, *istDL, Kit lens ( 18-55mm ), 50mm f1.7 lens, Tamron 70-300mm lens, Prinzflex 70-162 manual lens, Various old flashes.
DA* 50-135mm at 50mm

Tamron 17-50mm at 16mm

I am sure I must have some from the same show at 50mm on both lenses..
PPG Wedding photography Flickr
Concert photography
Currently on a Pentax hiatus until an FF Pentax is released

I do think that lenses need to become aquainted with before we start to see if they suit or not. Despite MTF testing, there is still another major facotr - the character of a lens. I've had so many lenses, and just as an example, these I have really liked:
Pentax 100mm f2.8M, Pentax 43mm f1.9FA, Pentax 18-135mmDA, Pentax 100mm Macro lenses in general. There are more really, but that's a few.
These I have not liked much:
Pentax 120mm f2.8M, 85mm f2M
There are plenty of other lenses that were just fine, like my Soligor 105mm pre-set lens, but the list could be too long...
Best regards, John
Kidding

Fabulous shots...

Cheers Jules...
My viewfinder is 576,000,000 pixels.
www.exaggeratedperspectives.com
Tamron 17-50mm

DA* 50-135mm at 50mm

PPG Wedding photography Flickr
Concert photography
Currently on a Pentax hiatus until an FF Pentax is released

Hey Gary how'd you get that 17-50 to go to 16mm?
Kidding

Fabulous shots...

Its magic Jules

PPG Wedding photography Flickr
Concert photography
Currently on a Pentax hiatus until an FF Pentax is released

there is still another major facotr - the character of a lens.
I think that is what I was trying to say about the old manual 50mm f1.7
It just seemed to react better to an environment I've tried various other lenses in. If I get chance tonight I'll dig some examples out. They are just snaps of my daughter in the riding school, though; nothing fancy.
Getting there! Thanks to you guys

Pentax K10d, *istDL, Kit lens ( 18-55mm ), 50mm f1.7 lens, Tamron 70-300mm lens, Prinzflex 70-162 manual lens, Various old flashes.

As reference, the background is a window & wall roughly 2 feet behind.
K-5 & A50 f/1.2 @ f/1.2 (so yeah, its about the glass

My Gallery
[url=http://pentaxphotogallery.com/Robbie Corrigan]ppg[/url]
I need two items/subjects/scenes shot with exact same settings and no PP applied.
Cheers,
Pa
http://www.photoblog.ie where every post have a musical reference as it's title.

My Gallery
[url=http://pentaxphotogallery.com/Robbie Corrigan]ppg[/url]
It's all about the glass covers a multitude of debates. You're looking for an comparison between focal lengths, not all about the glass

The way I see it when someone says it's all about the glass they often talk about sweet lens for warm
Portraits, great colours etc.
If I see two photos at same settings then
I can see any difference that the lens produces.
All of my lenses I'd consider fast (tamron 17-50 f2.8, Sigma70-200 f2.8, Pentax 100mm macro 2.8 and Sigma 30mm f2.

So when I hear spend your money on glass I thought it meant a Pentax 17-50 f2.8 and not a Tamron 17-50 f2.8.
But now I read it as buy good/fast lenses, not that lens X will give better image than lens Y at same settings.
The whole discussion started from when I told someone I was planning on upgrading from K-7 to K-5 and he said 'don't they say spend your money on glass'
Cheers,
Pa
http://www.photoblog.ie where every post have a musical reference as it's title.
You are not going to get enough comparisons of the type you are asking for to come to any definitive conclusions because people simply don't shoot an identical scene with two lenses !
Check Flikr or pBase for shots from lenses you are interested in - you can usually start to get a feel for the nature of each lens. However don't forget that the competency of the shooter matters too !
http://frogfish.smugmug.com/ Pentax. Pentax DA*300/4, Cosina 55/1.2, Lens Baby Composer Pro & Edge 80, AFA x1.7, Metz 50 af1.
Nikon. D800. D600. Sigma 500/4.5, Nikon 300/2.8 VRII, Sigma 120-300/2.8, Zeiss Distagon ZF2 21/2.8, Zeiss Distagon ZF2 35/2.0, Sigma 50/1.4, Nikkor 85/1.8, Nikon TC20EIII, Nikon TC14EII, Kenko x1.4, Sigma 2.0
I'm not sure if there's any validity gained by comparing identical shots in identical conditions with different lenses. The point is that different lenses will shine in different conditions and the trick is to know what to use and when.
I hope this makes sense!
Regards
David
Flickr
Nicola's Apartments, Kassiopi, Corfu
Some cameras, some lenses, some bits 'n' bobs
dinneenp
Member
People say it's all about the glass. Can you post some photos of an identical scene taken with 2 different lenses to show me examples of 'it's all about the glass', it produces lovely results etc?
For me I normally buy equiptment 2nd hand, same for lenses and normally get Tamron/Sigma over Pentax lenses as they tend to be cheaper.
Cheers,
Pa
http://www.photoblog.ie where every post have a musical reference as it's title.