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Forum: Post Your Photos! 02-04-2018, 03:11 PM  
Backyard Wild Animals Contest Otis's cousin from Poland
Posted By Piotr
Replies: 5
Views: 756
Five photos of squirrels from my garden in a tribute to Rupert
Forum: Lens Sample Photo Archive 04-06-2015, 11:35 AM  
Sigma 50-500mm F4.5-6.3 DG OS HSM
Posted By Piotr
Replies: 9
Views: 4,033
RICOH IMAGING COMPANY, LTD. PENTAX K-3 1/1000s f/8.0 at 410.0mm iso400


RICOH IMAGING COMPANY, LTD. PENTAX K-3 1/500s f/8.0 at 410.0mm iso320


RICOH IMAGING COMPANY, LTD. PENTAX K-3 1/200s f/8.0 at 450.0mm iso640
Forum: Lens Sample Photo Archive 03-17-2015, 01:43 PM  
Pentax DA* 55mm f/1.4 samples
Posted By Piotr
Replies: 170
Views: 64,183
Pentax K20D ,Pentax SMC P-DA* 55mm f/1.4 SDM 1/1000s f/2.0 at 55.0mm iso160



Pentax K20D ,Pentax SMC P-DA* 55mm f/1.4 SDM 1/2500s f/1.4 at 55.0mm iso100

Forum: Lens Sample Photo Archive 03-17-2015, 01:37 PM  
Pentax A 50mm f/1.2 samples
Posted By Piotr
Replies: 39
Views: 18,605
Pentax K-5 ,Pentax smc P-A 50mm f/1.2 1/250s f/1.2 at 50.0mm iso80

Forum: Lens Sample Photo Archive 03-17-2015, 01:33 PM  
Zeiss Distagon T* 2/28 ZK samples
Posted By Piotr
Replies: 2
Views: 2,383
Pentax K-5 ,Carl Zeiss Distagon T* 2/28 ZF 1/320s f/8.0 at 28.0mm iso80



Pentax K-5 ,Carl Zeiss Distagon T* 2/28 ZF 1/500s f/2.0 iso125

Forum: Pentax SLR Lens Discussion 10-01-2014, 01:16 PM  
Sigma 300mm f/2.8 EX DG
Posted By Piotr
Replies: 57
Views: 7,403
I agree. I sent my copy to service for calibartion. Now it works ok at f2.8. As you I'm looking for some testes and conclusion how it works w DA 1.4X.
Forum: Monthly Photo Contests 12-09-2013, 03:51 PM  
Woman in Angkor temple
Posted By Piotr
Replies: 0
Views: 422
Woman in Angkor temple
Forum: Lens Sample Photo Archive 11-29-2013, 12:42 PM  
Sigma 70-200mm f2.8 EX DG Macro HSM II Lens Samples
Posted By Piotr
Replies: 34
Views: 22,742
Pentax K20D ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/160s f/4.5 at 70.0mm iso400


Pentax K20D ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/160s f/3.2 at 200.0mm iso320


Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/1000s f/3.2 at 155.0mm iso400


Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/1000s f/4.5 at 200.0mm iso320



Pentax K20D ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/800s f/4.5 at 118.0mm iso160


Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/200s f/4.0 at 200.0mm iso500


Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/200s f/2.8 at 70.0mm iso1250


more shots from Cambodia here
Forum: Lens Clubs 10-09-2013, 01:49 PM  
DSLR fun with 28mm: Club for any 28mm lens
Posted By Piotr
Replies: 1,016
Views: 149,969
My first weekend with 30 year old shift lens. This is K lens so built from glass and metal only. Shift mechanism is simple and rather intuitive. I found this lens very good optically. It is very sharp at f3.5 in close distance and f8 at infinity. When shifted there are some lateral CA - but nothing terrible.

Pentax K-5 ,Pentax smc 28mm f/3.5 Shift
1/500s at 28.0mm iso80


Pentax K-5 ,Pentax smc 28mm f/3.5 Shift
1/3s at 28.0mm iso1000 - handheld


Pentax K-5 ,Pentax smc 28mm f/3.5 Shift
1/100s at 28.0mm iso125 - this one using orange builtin filter
Forum: Lens Clubs 06-11-2013, 02:31 PM  
Contax Lens Club
Posted By Piotr
Replies: 17
Views: 9,072
And here is my second Contax lens. Looking for some time for best zoom in 2x-70/80 range I decided to buy Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85.

I made some comparision tests with best prime lenses. It looks that CZ 28-85 is very sharp wide open and sharp it means in the center and on borders and not so far from best primes. At 28, 35 and 50mm my Sigma 17-50/2.8 DC OS HSM is less sharp without any discussion. From 28mm till 35mm abberations (green fringle) is worse than in my prime lenses.
Lens is quite big and heavy. There are 16 elements inside. Lens has big front - 82mm filter size. Zoom is pump type and i found it to be quite usefull.

Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/250s at 85.0mm f5.6 iso250


Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/50s at 75.0mm iso160


Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/250s f8 at 28.0mm iso160


Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/160s iso200 full


Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/100s at 85.0mm iso500


Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/125s at 85.0mm iso200


Pentax K-5 ,Carl Zeiss Vario-Sonnar T* 3,3-4,0/28-85
1/200s at 70.0mm iso250
Forum: Lens Clubs 06-11-2013, 04:46 AM  
Contax Lens Club
Posted By Piotr
Replies: 17
Views: 9,072
My first Contax lens was Carl Zeiss Sonnar T* 2.8/135. I had few 135mm (SMC Pentax 1:2.5 135mm, Meyer-Optik Gorlitz Orestor 2.8/135 , Leitz Elmarit-R 1:2.8/135) and after comparing them all together I decided to stay with Contax. It is well build lens w build-in hood. Very sharp, with beautiful bokeh and color rendition.
This lens was converted to K mount using Leitax solution.

Pentax K20D ,Carl Zeiss Sonnar T* 2.8/135
1/320s f/4.0 at 135.0mm iso160


Pentax K20D ,Carl Zeiss Sonnar T* 2.8/135
1/500s f/4.0 at 135.0mm iso200


Pentax K20D ,Carl Zeiss Sonnar T* 2.8/135
1/125s f/2.8 at 135.0mm iso100

Forum: Pentax SLR Lens Discussion 05-24-2013, 05:10 AM  
The Bokeh Club
Posted By Piotr
Replies: 20,313
Views: 1,803,559
Pentax K-5 ,Carl Zeiss Distagon T* 2/28 ZF
1/320s f/2.0 at 28.0mm iso160



Pentax K-5 ,Voigtlander 125mm f/2.5 SL Macro APO-Lanthar
1/1250s f/2.4 at 120.0mm iso80
Forum: Lens Sample Photo Archive 05-14-2013, 12:23 PM  
Sigma 17-50mm f/2.8 EX DC OS HSM Lens Samples
Posted By Piotr
Replies: 12
Views: 8,702
My Sigma as general purpose walk around lens during my last trip to China.

Pentax K-5 ,Sigma 17-50mm F2.8 DC Macro EX OS HSM
1/60s f/6.3 at 40.0mm iso800


Pentax K-5 ,Sigma 17-50mm F2.8 DC Macro EX OS HSM
1/125s f/6.3 at 50.0mm iso400


Pentax K-5 ,Sigma 17-50mm F2.8 DC Macro EX OS HSM
1/125s f/3.5 at 50.0mm iso320


Pentax K-5 ,Sigma 17-50mm F2.8 DC Macro EX OS HSM
1/500s f/5.0 at 29.0mm iso200


Pentax K-5 ,Sigma 17-50mm F2.8 DC Macro EX OS HSM
1/5s f/5.0 at 23.0mm iso1000


Pentax K-5 ,Sigma 17-50mm F2.8 DC Macro EX OS HSM
1/800s f/2.8 at 29.0mm iso500



...more shots from China trip
Forum: Lens Sample Photo Archive 05-14-2013, 11:52 AM  
Sigma 70-200mm f2.8 EX DG Macro HSM II Lens Samples
Posted By Piotr
Replies: 34
Views: 22,742
As always I used my Sigma during last trip to China.

Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/500s f/8.0 at 145.0mm iso250


Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/80s f/2.8 at 128.0mm iso1600


Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/40s f/8.0 at 145.0mm iso160


Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/2000s f/4.5 at 170.0mm iso320


Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/1000s f/4.0 at 145.0mm iso160


Pentax K-5 ,Sigma APO 70-200mm F2.8 II EX DG MACRO HSM
1/800s f/4.0 at 70.0mm iso400


all China photos
Forum: Post Your Photos! 05-14-2013, 11:40 AM  
Landscape Balloon in the Mist
Posted By Piotr
Replies: 10
Views: 837
sweet shot, great colors and well composed.
Forum: Lens Clubs 03-27-2013, 02:46 PM  
300mm plus Lens Club: discuss your long lenses
Posted By Piotr
Replies: 34,557
Views: 3,449,873
I've bought Sigma 50-500/4.5-6.3 year ago and still try to learn how and when to use it. Even if we have spring from few days - in calendar, outside it is still winter. All shots longer than 300mm.

Pentax K-5 ,Sigma 50-500mm f/4-6.3 EX DG/HSM
1/1600s f/6.3 at 370.0mm iso200


Pentax K-5 ,Sigma 50-500mm f/4-6.3 EX DG/HSM
1/500s f/8.0 at 500.0mm iso200


Pentax K-5 ,Sigma 50-500mm f/4-6.3 EX DG/HSM
1/1250s f/8.0 at 330.0mm iso200


Pentax K-5 ,Sigma 50-500mm f/4-6.3 EX DG/HSM
1/1250s f/8.0 at 370.0mm iso200
Forum: Pentax SLR Lens Discussion 03-16-2013, 03:51 PM  
"K" SMC Pentax 500mm F4.5
Posted By Piotr
Replies: 12
Views: 1,663
Yes, if it is described as taken with af 1.7

Not really, I used focus ring from lens and got confirmation from camera with additionall support from AF1.7.
k500 with AF1.7 was ok with istDS (6mb) not with with K5 (16mb).
In my opinion Sigma is better in any aspect.
Forum: Pentax SLR Lens Discussion 03-15-2013, 09:29 AM  
"K" SMC Pentax 500mm F4.5
Posted By Piotr
Replies: 12
Views: 1,663
I had Pentax 500mm. It is very big and heavy. I always used it with sand bag from car's window. It is difficult to use. It is sharp at f8, but at f8 it is quite dark and it is difficult do focus. So if you want to focus good you need to go to f4.5 - focus - change to f8 and take shot. Quite complicated.
Anyway, it is very long tele and with some patience it is possible to have some satisfaction :)

I don't have Sigma 150-500. I have last version of Sigma 50-500. It is really good at 500mm.

K500 samples
Forum: Lens Clubs 12-11-2012, 01:08 PM  
Leica Lens Club
Posted By Piotr
Replies: 450
Views: 105,285
re 7. I can recommend one Leica zoom. It is Vario-Elmarit 4/80-200 designed in Solms in 1996 and produced in Japan. According to "Leica Lens Compendium" it is similar design to Vario-Apo-Elmarit 1:2.8/70-180 and from f5.6 of similar picture quality.
According to Photodo it is better than Canon EF 70-200mm f/4 L USM (MTF score 4.2).
I like this lens, it is versatile, has build-in hood - classical stack of prime lenses.

Two pictures through my window at 200mm, ISO 640, f5.6 and f6.3





re 8. I have Carl Zeiss Distagon T* 2/28 ZK . For sure it has better contrast and better coating.
Forum: Lens Clubs 06-11-2012, 09:07 AM  
Voigtländer LBA - post your pics, notes and thoughts.
Posted By Piotr
Replies: 1,083
Views: 224,013
Few shots from last weekend.

Pentax K-5 ,Voigtlander 125mm f/2.5 SL Macro APO-Lanthar
1/250s f/4.0 at 120.0mm iso320



Pentax K-5 ,Voigtlander 125mm f/2.5 SL Macro APO-Lanthar
1/60s f/5.6 at 120.0mm iso640 full


Pentax K-5 ,Voigtlander 125mm f/2.5 SL Macro APO-Lanthar
1/160s f/5.0 iso160
Forum: Pentax SLR Lens Discussion 05-15-2012, 01:04 PM  
Zeiss ZK LBA - pics, notes, thoughts?
Posted By Piotr
Replies: 173
Views: 49,025
Pentax K-5 ,Carl Zeiss Distagon T* 2/28 ZK 1/60s f/9.0 at 28.0mm iso80


Pentax K-5 ,Carl Zeiss Distagon T* 2/28 ZK 1/320s f/8.0 at 28.0mm iso80


Pentax K-5 ,Carl Zeiss Distagon T* 2/28 ZK 1/250s f/8.0 at 28.0mm iso80
Forum: Pentax SLR Lens Discussion 05-15-2012, 12:56 PM  
Closeups
Posted By Piotr
Replies: 7
Views: 983
You can combine both: extension tubes and Raynox together.

http://www.pbase.com/piotreks/macro_setup

Extension tube is simple way to have close-up using standard lens like A50/1.2

Forum: Lens Clubs 05-14-2012, 11:37 AM  
The A Club
Posted By Piotr
Replies: 3,730
Views: 535,869
Sunset with A50/1.2 at f8

Pentax K-5 ,Pentax smc P-A 50mm f/1.2 1/80s f/8.0 at 50.0mm iso80


and A50/1.2 with additional ring as close-up lens (50% crop)

Pentax K-5 ,Pentax smc P-A 50mm f/1.2 1/200s f/3.2 at 50.0mm iso320
Forum: Lens Clubs 05-14-2012, 11:10 AM  
Post your ƒ1.2 Photos! (ƒ1.2 ONLY!)
Posted By Piotr
Replies: 2,000
Views: 484,250
Pentax K-5 ,Pentax smc P-A 50mm f/1.2 1/250s f/1.2 at 50.0mm iso80

Forum: Lens Clubs 05-14-2012, 11:06 AM  
Leica Lens Club
Posted By Piotr
Replies: 450
Views: 105,285
Here is my last shots with Summicron 90 as landscape lens.

First shot is during sunset, next two are at sunrise.

Pentax K-5 ,Leitz 90mm f/2 Summicron-R 1/250s f/8 at 90.0mm iso125


Pentax K-5 ,Leitz 90mm f/2 Summicron-R 1/200s f/5.6 at 90.0mm iso80


Pentax K-5 ,Leitz 90mm f/2 Summicron-R 1/80s f/5.6 at 90.0mm iso320
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