MightyMike

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

Pentax K-1
Pentax K10D

Pentax DA 18-55mm F3.5-5.6 AL
Pentax DAL 18-55mm F3.5-5.6 AL
Sigma 24mm F1.8 EX DG Macro Aspherical
Sigma UC Zoom 24-50mm F4-5.6
Tamron SP 24-135mm F3.5-5.6 AF Aspherical AD IF Macro Model 190D
2x Magnicon MC 28-70mm F3.5-4.5
Pentax FA 28-105mm F3.2-4.5 ED AL
Pentax FA 35mm F2.0 AL
SMC Pentax AF Zoom 35-70mm F2.8 for ME F
Pentax F 35-105mm F4-5.6 Macro
Sigma 50mm F1.4 EX DG HSM
Sigma 70-200mm F2.8 APO EX
Magnicon MC 70-210mm F4.5
Pentax F 70-210mm F4-5.6
Tamron 70-300mm F4-5.6 LD
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
Pentax FA 100-300mm F4.7-5.8
Tamron AF 100-300mm F5-6.3 Model 186D
Sigma APO 500mm F4.5 EX DG
-------------------------------------------------
Rokinon 8mm F3.5 Fish-Eye CS P/KA
Venus (Laowa) 12mm F2.8 D-Dreamer (Zero-Distortion) K/A Mount
Venus (Laowa) 15mm F4.0 1:1 Macro + Shift K-Mount Manual Aperture
Zenit MC MIR-20M 20mm F3.5 M42
SMC Pentax-K 20mm F4.0
2x Takumar Bayonet 28mm F2.8
SMC Pentax-A 28mm F2.8
CPC Macro 28mm F2.8 CCT P/KA
Image Super Coated 28mm F2.8 P/K
Vivitar 28mm F2.8 P/K
Super-Takumar 28mm F3.5 M42
3x Super-Multi-Coated Takumar 28mm F3.5 M42
SMC Pentax-M 28-50mm F3.5-4.5
Sigma UC Zoom 28-70mm F2.8-4.0 PK/A-R
Elicar Automatic 35mm F2.8 M42
Schneider-Kreuznach 35mm F2.8 Edixa-Curtagon M42
Super-Takumar 35mm F3.5 M42
Super-Multi-Coated Takumar 35m F3.5 M42
Zeniton 35mm F3.5 M42
Pentax 645-A 35mm F3.5
Sun Optical Sun-Zoom Macro 39-90mm F3.5 P/K
SMC Pentax-M 40-80mm F2.8-4.0
Munchen Hexatar 45mm F2.8 M42
6x Super-Takumar 50mm F1.4 M42
Super-Multi-Coated Takumar 50mm F1.4 M42
3x SMC Takumar 50mm F1.4 M42
2x SMC Pentax-M 50mm F1.7
SMC Pentax-A 50mm F1.7
Ricoh Rikonen 50mm F1.7 P/K
Auto Chinon 50mm F1.9 P/K
Ricoh AF Rikonen 50mm F2.0 P/K with Built in AF Module
2x Macro-Takumar 50mm F4.0 1:1 M42
Super-Multi-Coated Macro-Takuamr 50mm F4.0 M42
3x Auto-Takumar 55mm F1.8 M42
2x Super-Takumar 55mm F1.8 M42
5x SMC Takumar 55mm F1.8 M42
SMC Takumar 55mm F2.0 M42
Meyer-Optik Gorlitz Primoplan 58mm F1.9 M42
Helios-44-2 58mm F2.0 M42
Asahi Kogaku Takumar 58mm F2.4 M37
Super Takumar-Zoom 70-150mm F4.5
SMC Pentax-A 70-210mm F4.0
Pentax 645-A 75mm F2.8
SMC Pentax-M 75-150mm F4.0
Vivitar 75-205mm F3.8 MC Macro Focusing Zoom P/K
Takumar Bayonat Zoom 80-200mm F4.5
Rodenstock Rodagon 80mm F4.0 Enlarging lens
Helios-40-2 85mm F1.5 M42
Super-Multi-Coated Takumar 85mm F1.8 M42
2x SMC Pentax-K 85-210mm F4.5
Super-Takumar 105mm F2.8 M42
Pentax 645-A Macro 120mm F4.0
Samyang 135mm F2.0 ED UMC
Auto Chinon 135mm F2.8 M42
Opticam Auto 135mm F2.8 M42
Soligor Auto-Tele 135mm F2.8 M42
Takumar 135mm F3.5 Chrome M42
Super-Takumar 135mm F3.5 M42
Zeniton 135mm F3.5 T-mount
SMC Pentax -M 135mm F3.5
Super-Multi-Coated Takumar 150mm F4.0 M42
Pentax 645-A 150mm F3.5
Bushnell Automatic 200mm F3.5 M42
2x Super-Takumar 200mm F4.0 M42
2x SMC Pentax-M 200mm F4.0
2x Pentax 645-A 200mm F4.0
Zeniton 200mm F4.5 T-mount
Tele-Takumar 200mm F5.6 M42
Tele-Takumar 300mm F6.3 M42

Raynox HD-6600Pro 52mm 0.66x Wide Angle Adapter
Raynox HD-7000Pro 58mm 0.7x Wide Angle Adapter
Tamron Adaptall-2 140F 1.4x TC
APK Macro TelePlus MC7 2x TC P/K
Sigma APO 1.4x EX DG
Pentax Rear Converter-A 645 1.4x
Bower K-mount 5x monocular adapter
Lens2Scope 10mm 1:4 EOS monocular adapter

Kenko PK-A Extension Tubes
Set of PK Extension Tubes

Vivitar 283 Flash
Vivitar 2800 Flash
Vivitar 3500 Flash
Lenmar SBT36ZD Flash
Metz Mecablitz 58 AF-2 Digital
Gary Fong Lightsphere II Cloud C4
Gary Fong Lightsphere Collapsible Snoot with PowerGrid
2x Metz 60CT-1 Flash System
Opus Safe Sync
Vello 2.4Ghz Radio Trigger
3x Vello 2.4Ghz Receivers

Rollex 20
Pentax SV
2x Pentax Spotmatic SPII
3x Pentax Spotmatic F
Black Pentax ES II
Pentax K1000 (Brown Leather)
2x Pentax K2
Pentax MX
Pentax ME
Pentax ME Black
Pentax ME Super
Pentax ME F
Pentax Auto 110 kit, 18/24/50mm F2.8, winder, AF130P, Filters + hoods
Pentax Program Plus
Pentax Program Plus Black
Pentax 645
Fuji GSW690III
Pentax P30N

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
Pentax K-3...................................54500 pictures

Comments

Total: 44, showing: 1 – 20
« First‹ Previous123Next ›Last »
On article Nikon D7500: What you need to know (534 comments in total)
In reply to:

Retzius: 12-140? If I read that right that is a 18-200mm equivalent in full frame terms. To be honest that interests me more than the new camera although that looks like a very nice upgrade.

methinks its a typo LOL, otherwise that would be some lens!

Link | Posted on Apr 12, 2017 at 04:24 UTC
In reply to:

cosinaphile: hello its me ...... china

how are they different from western corp that not only mine you personal lives , but are then routinely hacked ?

... you meant "routinely hacked by China" right? So they are different, with this app at least China doesn't have to hack western corporations to obtain the same information.

This a was just a bit of fun and sarcasm, take it as such :)

Link | Posted on Jan 20, 2017 at 15:13 UTC
In reply to:

AngularJS: I'm wondering what circle those lenses can cover? Are they "future proof"?
The GFX throat diameter is 65mm, more than enough to cover the 44x33 (55mm diagonal) 50MPx Sony sensor. The new 100MPx Sony sensor is 67.2mm diagonal (53.7x40.4), so theoretically the throat is just ~3 mm short to cover it. Does it mean if Fuji one day decides to go with a slightly "more medium format" sensor, it's going to be another mount, another lenses? Any ideas folks (who knows math and optics :)? I've pre-ordered the 63mm and planning to buy the 110 when available, just wondering what to expect from the G mount in a few years :) Thanks.

I think it would be silly for them not to be able to cover the full 645 image circle

Link | Posted on Jan 20, 2017 at 00:07 UTC
In reply to:

mosc: Surprised to see the Macro only go 1:2. I know the sensor's bigger but 1:1 on FF is actually more sensor area than 1:2 on this format and those lenses certainly don't go north of $2,000. Are there no other medium format 1:1's out there?

One thing you shouldn't forget is the magnification factor on apparent resolution when printed... a 33 x 44mm sensor regardless of resolution (don't go to some silly extreme now) is enlarged by a much lower factor than a m43rds sensor is when printed at the same size. This ultimately means the m43rds lens has to out resolve the medium format lens by a large margin likely beyond what is capable in modern optics. If you choose to enlarge the images the same amount the medium format will get you an 9x12 print where the m43rds will only be a 4.7x3.5, the content when compared will look identical in the zone the m43rds sensor captured except that the m43rds photo will have more pixels (not necessarily more resolution). This is the whole reason medium format lenses of the past didn't need to be high resolving, the sensor (film) was so large even bad lenses looked good. the smaller the format the higher resolving the lens has to be so it doesn't look like junk.

Link | Posted on Jan 20, 2017 at 00:05 UTC
In reply to:

MightyMike: Correct me if I'm wrong, but with the medium format system being a 0.75x crop factor doesn't that make the 63mm F2.8 offer a similar result to a 47mm F2.1 (50mm F2.1) on a FF setup? or even for that matter a 31.5mm F1.4 (similar to a 35mm F1.4) on an APS-C setup. I don't doubt the lens will be top notch, I'm just suggesting the end result can be duplicated on a smaller sensor system so that diminishes some of the benefit of going to a larger sensor system. Also the 32-64mm F4.0 (24-48mm F3.0 on FF, or 16-32mm F2.0 on APS-C) I suppose any 24-70mm F2.8 would compete on FF and the Sigma 18-35mm F1.8 would compete on APS-C. Same issue, no doubt its going to be a top notch but the end result can be matched by a lesser system. Don't jump on me as I'm not bashing, I'm just questioning the benefit of these 2 lenses and the medium format system over an existing lesser system.

I agree, DOF isn't the be all and end all however beyond the widest apertures all systems are equal. sure you can stop down more before diffraction but you still end up with the same DOF as the smaller system has at the same diffraction limitation (with some minor variations based on pixel density and print size)... I stopped getting exited about larger formats unless they were really large, my film Pentax 645 is certainly a lot nicer to play with in regards to the film negatives and positives over my film 35mm cameras, and my film Fuji GSW690III is that much more spectacular. However those large differences aren't so spectacular in the digital era and though there are some small advantages its very hard to justify a larger format over a smaller format in any way but the extreme ends of the spectrum.... so I may yawn at this and other may have a differing opinion, its just not getting me exited anymore, the differences are too small.

Link | Posted on Jan 19, 2017 at 21:00 UTC
In reply to:

MightyMike: Correct me if I'm wrong, but with the medium format system being a 0.75x crop factor doesn't that make the 63mm F2.8 offer a similar result to a 47mm F2.1 (50mm F2.1) on a FF setup? or even for that matter a 31.5mm F1.4 (similar to a 35mm F1.4) on an APS-C setup. I don't doubt the lens will be top notch, I'm just suggesting the end result can be duplicated on a smaller sensor system so that diminishes some of the benefit of going to a larger sensor system. Also the 32-64mm F4.0 (24-48mm F3.0 on FF, or 16-32mm F2.0 on APS-C) I suppose any 24-70mm F2.8 would compete on FF and the Sigma 18-35mm F1.8 would compete on APS-C. Same issue, no doubt its going to be a top notch but the end result can be matched by a lesser system. Don't jump on me as I'm not bashing, I'm just questioning the benefit of these 2 lenses and the medium format system over an existing lesser system.

I never said there wasn't any benefit, but with those 2 lenses the benefit is less than it could be. I know the system is brand new so more is to come but come on, give us something to drool over, not something that can be similarly matched by existing systems.

Link | Posted on Jan 19, 2017 at 20:15 UTC
In reply to:

mosc: Surprised to see the Macro only go 1:2. I know the sensor's bigger but 1:1 on FF is actually more sensor area than 1:2 on this format and those lenses certainly don't go north of $2,000. Are there no other medium format 1:1's out there?

1:1 is 1:1 regardless of the format size, if your sensor is 7mm across then 1:1 should give you 7mm across the frame, that same 1:1 will give you 36mm across the frame on FF and of course more with a larger format. That said the Pentax 645-A/645-FA 120mm F4.0 may actually be the only 1:1 macro lens for a medium format camera, but there may be one out there that we're forgetting.

Link | Posted on Jan 19, 2017 at 20:11 UTC
In reply to:

mosc: Surprised to see the Macro only go 1:2. I know the sensor's bigger but 1:1 on FF is actually more sensor area than 1:2 on this format and those lenses certainly don't go north of $2,000. Are there no other medium format 1:1's out there?

The Pentax 645-A and 645-FA 120mm F4.0 does 1:1, likely one of the few that does

Link | Posted on Jan 19, 2017 at 18:52 UTC

Correct me if I'm wrong, but with the medium format system being a 0.75x crop factor doesn't that make the 63mm F2.8 offer a similar result to a 47mm F2.1 (50mm F2.1) on a FF setup? or even for that matter a 31.5mm F1.4 (similar to a 35mm F1.4) on an APS-C setup. I don't doubt the lens will be top notch, I'm just suggesting the end result can be duplicated on a smaller sensor system so that diminishes some of the benefit of going to a larger sensor system. Also the 32-64mm F4.0 (24-48mm F3.0 on FF, or 16-32mm F2.0 on APS-C) I suppose any 24-70mm F2.8 would compete on FF and the Sigma 18-35mm F1.8 would compete on APS-C. Same issue, no doubt its going to be a top notch but the end result can be matched by a lesser system. Don't jump on me as I'm not bashing, I'm just questioning the benefit of these 2 lenses and the medium format system over an existing lesser system.

Link | Posted on Jan 19, 2017 at 15:37 UTC as 12th comment | 6 replies
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

sh10453: Obviously the 20cm is just a typo.
Minimum working distance (Subject to Front Element): 20mm (from their spec sheet).

The question is: At $199 what does this lens give me that bellows or inexpensive extension tubes do not???

Are you talking about a 50mm macro lens or a 50mm normal lens? sure if you extent the 100mm macro to its minimum focusing distance and then add extension tubes it likely offers more magnification than a normal 50mm lens focused down to 45cm (non macro magnification) then adding the tubes. However if you're putting the same extension of tubes on a 50mm macro with the 50mm set to the minimum focus distance it should out magnify the 100mm macro under the same configuration... unless one of the lenses has severe focus breathing. set them both to infinity use the same amount of extension tubes and the wider angle lens will offer more magnification.

Link | Posted on Dec 28, 2016 at 16:26 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

Tons o Glass 0 Class: Hmm... I wonder if they were inspired by the OM 20/2 MC MACRO and if this ZY lens would be a cheap way to get a taste of that rare optic. It looks like the useful magnification ranges are similar and they're both 6 elements in 4 groups.

http://www.alanwood.net/photography/olympus/macro-lens-20-2.html

Why why why did they go with so few aperture blades? Six blades are the bare minimum but are a pet peeve of mine, with five being more interesting. But three? Are triangles better than hexagons?

Not seeing much of a triangle pattern in the velcro photo, the bokeh is busy but then the scene is busy

Link | Posted on Dec 21, 2016 at 15:15 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

hanhait: I think it should be considered as a 20 mm lens, already reversed for you. You can save the messing around with reversal adapters, difficult focusing etc. Basically a good idea. It's a one thing- one trick lens. It would take you much effort and probably more money to do that one thing in a different way. So its strength is in the limitation.

Except that reversing a 20mm lens should (could) give you the same magnification at a longer working distance... this of course depending on which lens you've reversed. The Pentax M 20mm F4.0 reversed with 43mm of extension gives 4.5:1 magnification at a working distance of 42mm. that lens is also small and light weight.

Link | Posted on Dec 21, 2016 at 15:02 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

sh10453: Obviously the 20cm is just a typo.
Minimum working distance (Subject to Front Element): 20mm (from their spec sheet).

The question is: At $199 what does this lens give me that bellows or inexpensive extension tubes do not???

The amount of magnification you get from extension whether its tubes or a bellows depends on what the focal length of the lens you're using is. Put your extension tubes on a 200mm lens and you'll get less magnification, put them on a 50mm lens and you'll get more magnification.

Link | Posted on Dec 20, 2016 at 22:27 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

NEWSTREAM: Instead of getting the MFT-mount for a MFT-body, maybe Its worth getting the Nikon or Canon version, coupled with the Metabones Speedbooster for that extra stop of light?

There are a few programs out there, some expensive, some cheap. I'm too cheap to pay $2000-$5000 for one of the expensive products so i use Winlens3D basic

Link | Posted on Dec 20, 2016 at 14:41 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

Old Cameras: Close focus 20cm? More like 20mm. Or 2mm.

Well I won't take back my proof that it "could" be longer based on design... However it seems clear they've updated their specifications from the initial press release and with a working distance of 20mm i think i may pass on this one

Link | Posted on Dec 20, 2016 at 05:19 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

Old Cameras: Close focus 20cm? More like 20mm. Or 2mm.

Proof...

The Pentax M 28mm F2.8 version 2 (Also know as the A 28mm F2.8 and F 28mm F2.8)... I have the optical formula in my optics program, I reversed it, then added 82.8mm of extension. the result is 4.5:1 magnification with a focus distance of 20.5cm and a working distance of 4.3cm. Different lens designs will vary in the focus distance and working distance for the same magnification even if the focal length is the same.

Link | Posted on Dec 20, 2016 at 05:02 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

NEWSTREAM: Instead of getting the MFT-mount for a MFT-body, maybe Its worth getting the Nikon or Canon version, coupled with the Metabones Speedbooster for that extra stop of light?

For Proof...

I have in my optics program the optical formula for the Pentax M28mm F2.8 Version 2, same as the Pentax A28mm F2.8 and Pentax F28mm F2.8. I got the formula from its patent. Reverse it, add 83mm of extension and you get 4.5:1 magnification with a focus distance of 19.75cm and a working distance of 4.3cm. Yes 20cm MFD is quite possible and a working distance of 9.5cm is also quite possible.

Link | Posted on Dec 20, 2016 at 04:40 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

NEWSTREAM: Instead of getting the MFT-mount for a MFT-body, maybe Its worth getting the Nikon or Canon version, coupled with the Metabones Speedbooster for that extra stop of light?

"But I wouldn't expect focal reducer to work at macro distances at all -- it's likely going to be completely unusable."

Care to back up your thoughts on the matter? I see no reason why a focal reducer would be any different at macro focusing distances than normal distances... but you would lose overall magnification thats for sure.

Link | Posted on Dec 20, 2016 at 03:00 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

Old Cameras: Close focus 20cm? More like 20mm. Or 2mm.

I'll wait for the correct answer before judging whether its a typo or not, take any lens, reverse it, the focal length actually stays the same but the working distance for high magnifications can be large.

Link | Posted on Dec 20, 2016 at 02:38 UTC
On article New 20mm F2 4.5x macro lens released by Mitakon (122 comments in total)
In reply to:

NEWSTREAM: Instead of getting the MFT-mount for a MFT-body, maybe Its worth getting the Nikon or Canon version, coupled with the Metabones Speedbooster for that extra stop of light?

anytime you combine optics there is a chance they won't work well together, however adding a teleconverter spreads out the image circle and unless the parent lens can out resolve the sensor by the same amount you're teleconverting or more you'll see a loss of resolution. A speed booster does the opposite and therefore in most cases the opposite result occurs... however keep in mind you're adding 1 stop of light but projecting onto a sensor that is 1 stop worse in light collection if the technology of the sensors are the same. the benefit of adding 1 stop cancels itself out. So such a device is still useful if you don't have the equivalent lens in the smaller sensor mount but if you do have the equivalent lens its not really going to be helpful. the resulting lens would be a 14mm F1.4 with a magnification ratio of 2.9x-3.2x, your F16 smallest aperture will now be F11, the working distance should remain the same.

Link | Posted on Dec 20, 2016 at 01:11 UTC
Total: 44, showing: 1 – 20
« First‹ Previous123Next ›Last »