MightyMike

MightyMike

Lives in Canada Brampton, Canada
Works as a Distribution and Logistics
Joined on Nov 11, 2004
About me:

Pentax K-3

Sigma 8-16mm F4.5-5.6 HSM DC
Pentax DA 10-17mm F3.5-4.5 Fish-Eye
Sigma 17-70mm F2.8-4.0 DC OS HSM
Pentax DA 18-55mm F3.5-5.6
Pentax DAL 18-55mm F3.5-5.6
Sigma 24mm F1.8 EX DG Macro Aspherical
Pentax F 24-50mm F4.0
Pentax FA 28-80mm F3.5-4.7 PZ
Pentax FA 28-105mm F4-5.6 IF Silver
Pentax FA 35mm F2.0 AL
Pentax F 35-70mm F3.5-4.5 Macro
Pentax F 35-105mm F4-5.6 Macro
2x Pentax FA 50mm F1.4
2x Pentax F 50mm F1.7
Sigma 50mm F1.4 EX DG HSM
Pentax DAL 50-200mm F4-5.6 ED
Sigma 70-200mm F2.8 APO EX
Magnicon 70-210mm F4-5.6
Pentax F 70-210mm F4-5.6 ED
Magnicon 70-210mm F4.5
Sigma 75-200mm F3.8 AF Zoom Multi Coated
Pentax FA 77mm F1.8 Limited Silver
Pentax F 100mm F2.8 Macro
Sigma APO 100-300mm F4 EX DG
Sigma 100-300mm F4.5-6.7 DL
Sigma APO 500mm F4.5 EX DG
-------------------------------------------------
Rokinon 8mm F3.5 Fish-Eye CS
Zenitar 16mm F2.8 P/K
Zenit MC MIR-20M 20mm F3.5 M42
Tamron 02B 28mm F2.5 AD2
Formula 5 MC 28mm F2.8 M42
2x SMC Pentax-M 28mm F2.8 Ver. 1
SMC Pentax-A 28mm F2.8
Soligor Auto-Wide 28mm F2.8 M42
2x Super-Takumar 28mm F3.5 M42
Super-Multi-Coated Takumar 28mm F3.5 M42
SMC Pentax-M 28mm F3.5
Ricoh Rikonen P Zoom 28-100mm F4.0 Macro P/K
Dimension 35mm F2.8 M42
Schneider-Kreuznach 35mm F2.8 Edixa-Curtagon M42
Tokina AT-X 35-70mm F2.8 PK/A
3x Super-Takumar 35mm F3.5 M42
2x Super-Multi-Coated Takumar 35mm F3.5 M42
2x SMC Pentax-A 35-105mm F3.5
Pentax 645-A 35mm F3.5
Soligor 35-70mm F2.5-3.5 P/K
SMC Pentax-M 35-70mm F2.8-3.5
RMC Tokina 35-105mm F3.5-4.3 M42
SMC Pentax-M 40-80mm F2.8-4.0
Munchen Hexatar 45mm F2.8 M42
Super-Takumar 50mm F1.4 M42
Super-Multi-Coated Takumar 50mm F1.4 M42
SMC Pentax-M 50mm F1.4
6x SMC Pentax-M 50mm F1.7
Ricoh Rikonen 50mm F1.7 P/K
Vivitar 50mm F1.7 MC P/K
4x SMC Pentax-A 50mm F1.7
2x SMC Pentax-A 50mm F2.0
Ricoh XR Rikonen 50mm F2.0 S P/K
Domiplan 50mm F2.8 M42
Industar 50-2 50mm F3.5 Tessar M42
Macro-Takumar 50mm F4.0 1:1 M42
Super-Multi-Coated Macro-Takumar 50mm F4.0 M42
Auto-Takumar 55mm F1.8 M42
2x Super-Takumar 55mm F1.8 M42
2x Super-Takumar 55mm F2.0 M42
SMC Takumar 55mm F2.0 M42
SMC Pentax-K 55mm F2.0
Meyer-Optik Gorlitz Primoplan 58mm F1.9 M42
Helios-44-2 58mm F2.0 M42
Helios-44m-4 58mm F2.0 M42
Vivitar Series 1 70-210mm F2.8-4.0 PK/A
2x SMC Pentax-M 75-150mm F4.0
Pentax 645-A 75mm F2.8
Super-Takumar 85mm F1.9 M42
Super-Multi-Coated Takumar-Zoom 85-210mm F4.5 M42
SMC Pentax K 85-210mm F4.5 + Close-Up Attachment
SUN Optical Sola 9cm F4 M42 (Leica Clone)
Bellows-Takumar 100mm F4.0 M42
Super-Multi-Coated Macro-Takumar 100mm F4.0 M42
SMC Pentax M 100mm F4.0
SMC Pentax A 100mm F4.0
Super-Takumar 105mm F2.8 M42
Rodenstock Rodagon 105mm F5.6 Enlarging Lens
Pentax 645-A Macro 120mm F4.0
Spiratone Telephoto YS 135mm F1.8 M42
2x Super-Takumar 135mm F2.5 M42
2x Takumar Bayonet 135mm F2.5 P/K
2x Takumar 135mm F3.5 Chrome M42
5x Super-Takumar 135mm F3.5 M42
2x Super-Multi-Coated Takumar 135mm F3.5 M42
Soligor Auto-Tele 135mm F3.5 M42
SMC Pentax-K 135mm F3.5
Rodenstock Rodagon 135mm F5.6 Enlarging Lens
SMC Pentax-M 150mm F3.5
Rodenstock Rodagon 150mm F5.6 Enlarging Lens
Pentax 645-A 150mm F3.5
Carsen 180mm F3.5 M42
Kitstar 200mm F3.3 P/K
Takumar 200mm F3.5 M42
Bushnell 200mm F3.5 M42
2x Vivitar 200mm F3.5 M42
2x Super-Takumar 200mm F4.0 M42
2x SMC Pentax-M 200mm F4.0
Pentax 645-A 200mm F4.0
Takumar 200mm F5.6 M42
Tele-Takumar 200mm F5.6 M42
Sigma Mirror-Telephoto 400mm F5.6 Multi Coated M42
Rokinon 800mm F8.0 Mirror T-mount White

Vivitar 3x-1
Sigma APO 1.4x EX DG
Tamron-F 1.4x TC PZ-AF
Promaster Spectrum 7 2x PZ-AF TC
Vivitar 2X-22 2x TC P/K
Pentax Rear Converter-A 2X-S
Pentax Rear Converter-A 645 1.4x
Bower K-mount 5x monocular adapter

Kenko PK-A Extension Tubes
Vivitar PK Extension Tubes
Set of PK Extension Tubes
Asahi Bellows Unit
Genuine Pentax M42 Extention Tubes
Royal M42 Extension Tubes

Interflash EBC-19
Braun 2000/280 BVC
Starblitz 2000 BTZ
Vivitar 2800 Flash
Vivitar 3500 Flash
Lenmar SBT36ZD Flash
Blacks ST45 flash
Pentax AF200S flash
Metz Mecablitz 58 AF-2 Digital
Gary Fong LightSphere II Cloud C4
Opus Safe Sync

Rollex 20
2x Pentax SV
Honeywell Pentax Spotmatic
Pentax Spotmatic SP
2x Silver Pentax Spotmatic F
Pentax ES II
Pentax K1000 Brown
Pentax KM
2x Pentax MX
Pentax Auto 110 kit, 18/24/50mm F2.8, winder, AF130P, Filters + hoods
Pentax LX
Pentax Program Plus Silver
Pentax Super A
Pentax 645
Pentax SF1
Pentax ZX-M
Fuji GSW690III

Tasco BKRD 42 Red Dot Sight

Previously owned cameras

Fuji Finepix 2800................. 5000 pictures
Black Panasonic DMC-FZ20....20000 pictures
Silver Panasonic DMC-FZ30.... 3000 pictures
Black Panasonic DMC-FZ30....22000 pictures
Pentax K10D.....................33000 pictures
Pentax K20D.....................55000 pictures
Pentax K-7.......................34000 pictures
Pentax K-5 #1....................5500 pictures
Pentax K-x.......................13000 pictures
Pentax K-5 #2...................36000 pictures
Pentax K-5IIs....................14000 pictures

Comments

Total: 14, showing: 1 – 14
On Panasonic DMC-GM1 preview (631 comments in total)

The equivalence chart information about the Q7 is wrong, it starts at 23mm not 28mm

Direct link | Posted on Oct 17, 2013 at 20:12 UTC as 88th comment | 2 replies

Wow a flashlight and mounting bracket that costs $100, pitiful!

Direct link | Posted on Sep 5, 2013 at 05:01 UTC as 18th comment
On Did Sigma design the Olympus M.Zuiko 75mm F1.8? article (200 comments in total)
In reply to:

ntsan: Sony E 50mm F1.8 and Leica 25mm 1.4 is also designed by Sigma too

"No, the Leica 25mm f1.4 Panasonic is designed by Leica"

look really carefully, the Panasonic patented m43rds 25mm F1.4 has fewer elements is a slightly different configuration than the Sigma patented one, and the Sigma matches the promotional material where the Panasonic doesn't.

Direct link | Posted on Aug 29, 2013 at 23:35 UTC
On Did Sigma design the Olympus M.Zuiko 75mm F1.8? article (200 comments in total)
In reply to:

MightyMike: Sigma also designed the Pana-Leica 25mm F1.4 for full size four-thirds and the Pana-Leica 25mm F1.4 for micro 43rds, they designed the Olympus 90-250mm F2.8 and the 75-300mm F4.8-6.3. The designed one of the 40-150 slower lenses too. I'm sure there are others. the thing is all companies have the ability to design great lenses and all companies sometimes cut too many corners and design junk so no need to be a Sigma basher as they're actually pretty good. Why does Sigma get to make lenses for Olympus, Panasonic and Leica? I supposed these companies fished around for a design so they don't tie up their resources that are actually being put to other things. its either a resources issue or Sigma designs these lenses for the sole purpose of selling the design to another company. Another case is the Tokina 16.5-135mm that patent is owned by Pentax. and if you look hard enough you'll find such collaboration or sharing across many companies.

rikyxxx You don't need to believe it however i provided enough evidence that Sigma does a heck of a lot more than we give them credit for, the same is true for Tamron and Tokina, until one takes a comprehensive look through thousands of patents one can only know what they see presented to them... I was surprised myself when i found such connections but the way i hear it many Japanese companies along with competition also work to help each other out and keep the whole sector alive and well.

Direct link | Posted on Aug 29, 2013 at 20:55 UTC
On Did Sigma design the Olympus M.Zuiko 75mm F1.8? article (200 comments in total)
In reply to:

Frank_BR: Something is very strange in this history.

The Zuiko 75mm F1.8 lens was announced in Feb 8, 2012. However, according to the Egami blog the Sigma patent's filing date is Feb 3, 2012, that is, only five days before the announcement.

On the other hand, after a lens design starts, it takes months, if not years, until the production (and announcement) effectively happens. So, it is not reasonable to think that Sigma started the design process of that lens long before filing the patent application.

I suspect you're worried more than the companies are, I'd suspect that most employees are very loyal to their well paying excellent job and wouldn't want to ruin their lives by getting caught helping the competition. in this kind of job its not hard labour but a labour of love otherwise you wouldn't easily make it into such a position.

Direct link | Posted on Aug 29, 2013 at 20:23 UTC
On Did Sigma design the Olympus M.Zuiko 75mm F1.8? article (200 comments in total)
In reply to:

MightyMike: Sigma also designed the Pana-Leica 25mm F1.4 for full size four-thirds and the Pana-Leica 25mm F1.4 for micro 43rds, they designed the Olympus 90-250mm F2.8 and the 75-300mm F4.8-6.3. The designed one of the 40-150 slower lenses too. I'm sure there are others. the thing is all companies have the ability to design great lenses and all companies sometimes cut too many corners and design junk so no need to be a Sigma basher as they're actually pretty good. Why does Sigma get to make lenses for Olympus, Panasonic and Leica? I supposed these companies fished around for a design so they don't tie up their resources that are actually being put to other things. its either a resources issue or Sigma designs these lenses for the sole purpose of selling the design to another company. Another case is the Tokina 16.5-135mm that patent is owned by Pentax. and if you look hard enough you'll find such collaboration or sharing across many companies.

rikyxxx I do have an answer for that, look a the panasonic patent, a very similar design to the Sigma but with fewer elements, so was Panasonic going to come out with a mark I version of the lens or are they just patenting it for future use when the contract with Sigma runs out. They also could've both worked on the lens together at the same time and after several designs were presented they decided the Sigma design was the better of the 2. Keep in mind that patent dates are extremely variable and sometimes things don't show up in patents until years after the product reaches the market.

Direct link | Posted on Aug 29, 2013 at 20:16 UTC
On Did Sigma design the Olympus M.Zuiko 75mm F1.8? article (200 comments in total)
In reply to:

MightyMike: Sigma also designed the Pana-Leica 25mm F1.4 for full size four-thirds and the Pana-Leica 25mm F1.4 for micro 43rds, they designed the Olympus 90-250mm F2.8 and the 75-300mm F4.8-6.3. The designed one of the 40-150 slower lenses too. I'm sure there are others. the thing is all companies have the ability to design great lenses and all companies sometimes cut too many corners and design junk so no need to be a Sigma basher as they're actually pretty good. Why does Sigma get to make lenses for Olympus, Panasonic and Leica? I supposed these companies fished around for a design so they don't tie up their resources that are actually being put to other things. its either a resources issue or Sigma designs these lenses for the sole purpose of selling the design to another company. Another case is the Tokina 16.5-135mm that patent is owned by Pentax. and if you look hard enough you'll find such collaboration or sharing across many companies.

rikyxxx Yes just find those Sigma patents for both of the the 25mm F1.4 and you'll see they look identical and are identical to the promotional material provided by Panasonic... I never actually saved the patent to my computer but i took from the m43rds patent the optical formula and plugged it into an optics program. its performance comes out just like the reviews and peoples opinions, I also did the same thing with the Panasonic 20mm F1.7 and fount it to be an excellent lens by comparison however that is only because the rear element has 2 aspheric surfaces, remove those and you'd thing the lens was junk!

Direct link | Posted on Aug 29, 2013 at 19:10 UTC
On Did Sigma design the Olympus M.Zuiko 75mm F1.8? article (200 comments in total)
In reply to:

Frank_BR: Something is very strange in this history.

The Zuiko 75mm F1.8 lens was announced in Feb 8, 2012. However, according to the Egami blog the Sigma patent's filing date is Feb 3, 2012, that is, only five days before the announcement.

On the other hand, after a lens design starts, it takes months, if not years, until the production (and announcement) effectively happens. So, it is not reasonable to think that Sigma started the design process of that lens long before filing the patent application.

Patents rarely are applied for or filed at the exact time of the start of a project or the announcement of a project, some patents don't become visible to the public until years after the lens has been on the market. its a non issue as to the dates

Direct link | Posted on Aug 29, 2013 at 19:02 UTC
On Did Sigma design the Olympus M.Zuiko 75mm F1.8? article (200 comments in total)
In reply to:

citizenlouie: Though my optical design knowledge is rudimentary, but looking at the two designs above, they would have different light collecting properties.

The middle element in the Sigma design is thicker. Unless Sigma decided to use ED or Super ED glass, the refraction of that lens will be significantly larger, and light traveling pattern after that would be different. The front element of Sigma's is over-engineered compared with m.Zuiko's. Don't know how much those etches around the edge of m.Zuiko lenses would affect the optical quality.

So yes, different proportion of element's size and glass used will change the final IQ. They're still of the similar design, but IQs would be different. And production costs would be very different due to whether ED elements are used or not (and Olympus's production technology is higher than Sigmas's).

You make a good point and i noticed that too, however if you've ever seen full patents you'll fine most of them have more then 1 optical formula for the same sort of lens, all very similar, the one that was posted may not be the one that was used. Also the promotional material isn't always right, i noticed this when i dug up the patent for the Panasonic 20mm F1.7, the formula that is in the promotional material is in that patent but for a lens this is wider angle and has an F1.8 aperture where a very similar but slightly different optical formula in he patent right next to that one has the specifications for the 20mm F1.7 to within a few hundredths of a decimal place. so either we don't see the whole picture of the promotional material might be slightly off.

Direct link | Posted on Aug 29, 2013 at 18:59 UTC
On Did Sigma design the Olympus M.Zuiko 75mm F1.8? article (200 comments in total)

Sigma also designed the Pana-Leica 25mm F1.4 for full size four-thirds and the Pana-Leica 25mm F1.4 for micro 43rds, they designed the Olympus 90-250mm F2.8 and the 75-300mm F4.8-6.3. The designed one of the 40-150 slower lenses too. I'm sure there are others. the thing is all companies have the ability to design great lenses and all companies sometimes cut too many corners and design junk so no need to be a Sigma basher as they're actually pretty good. Why does Sigma get to make lenses for Olympus, Panasonic and Leica? I supposed these companies fished around for a design so they don't tie up their resources that are actually being put to other things. its either a resources issue or Sigma designs these lenses for the sole purpose of selling the design to another company. Another case is the Tokina 16.5-135mm that patent is owned by Pentax. and if you look hard enough you'll find such collaboration or sharing across many companies.

Direct link | Posted on Aug 29, 2013 at 12:51 UTC as 48th comment | 8 replies

Would you have to enter the password every freaken time you switch lenses? that would be asinine for anyone who needs to switch lenses and get the next shot immediately... give them credit for thinking outside the box but maybe this one needs some more thinking.

Direct link | Posted on Apr 15, 2013 at 19:29 UTC as 80th comment | 2 replies
In reply to:

Lee Jay: Almost up to 1/4 the resolution of a low-end APS-c pentamirror OVF, with only infinitely more lag and infinitely more battery consumption along with 1/64th the dynamic range and color gamut.

I guess some of us still have young eyes, I haven't encountered a situation worth shooting where it was so dark i couldn't even see anything... I guess i haven't been trying to photograph black bears hibernating in a coal mine.

Direct link | Posted on Jan 24, 2013 at 05:36 UTC
On Just deployed: New dpreview.com forums system article (699 comments in total)

here are my complaints

http://forums.dpreview.com/forums/post/50002298

Direct link | Posted on Oct 4, 2012 at 04:16 UTC as 283rd comment | 2 replies
In reply to:

GK UK: Strange to get less for the same money. That said I could never see the appeal for the 17-50 over the 18-50 model (see attached review). Sure it is not f2.8 across the range but it is a lot less in terms of £ or $. It also has OS although it is not EX.

http://photographic-central.blogspot.com/

are the IS elements removed or locked in place? they are both 17 element 13 group... no elements removed

Direct link | Posted on Dec 3, 2011 at 02:49 UTC
Total: 14, showing: 1 – 14