[ivanvernon]

I have several fast medium format lenses, most of them f 2.8 and a few even larger apertures such as the Pentax 67 105mm f 2.4.

I thought it would be neat if people who owned an ƒ2.8 would post their best photos taken ONLY at ƒ2.8 or wider.

I was wondering if any forum members would post their photos taken ONLY AT ƒ2.8 or wider (FROM ANY LENS, MAKE, or MODEL... as long as on a Pentax camera of course!).

Thanks!

---

Last edited by MarkJerling; 03-25-2019 at 02:33 PM.

[IgorZ]

Great idea! Don't forget that Mamiya 80mm F1.9...

[ivanvernon]

Great idea! Don't forget that Mamiya 80mm F1.9...

Thanks. I have a few lenses that are faster than f 2.8. These are the Mamiya C 80mm f 1.9 and the Pentax 67 105mm f 2.4. There are several others out there, a Contax and some others, most too expensive for me to add to my collection. Hopefully, some of the folks fortunate enough to have some of these expensive, fast lenses will post here.

There is also a concept called "absolute aperture." It is calculated as follows: Focal Length divided by aperture. For example, for the Mamiya/1.9, absolute aperture would be 80/1.9 = 42.1. The meaning of the absolute aperture concept is that the higher the absolute aperture, the greater are the characteristics that make fast lenses intereting to photographers--depth of field, subject-ground separation, bokeh aspects, etc.

I am thinking that the lenses posting here can be any brand but using Pentax cameras unless there is a specific reason why not. It is also expected that medium format cameras will be used when possible. An exception might be the Mamiya C 80mm f 1.9, which cannot be adapted to Pentax 645 format cameras, but which can be adapted to the K-1.

Nothing to post right this minute, but will be back with some photos soon.

[ivanvernon]

5 Fast Aperture Medium Format Lenses You'll Envy

[ivanvernon]

Here are a number of shots with the Pentax 67 105mm f 2.4. The kit is the 645Z with Pentax brand P67-P645 adapter, and all shot are taken handheld at f 2.4. Subjects were selected to emphasize the FOV, bokeh, and narrow focal plane of the 105/2.4. Most were taken at MFD (minimum focal distance).

[ivanvernon]

The Pentax 67 150mm f 2.8 is an older lens, and was dropped from the line when Pentax began offering the 165mm focal length. I was fortunate to find one in mint condition for the very competitive price of only $70.00 plus $38 freight. The lens is in near mint condition, and an excellent value. Its 150mm focal length and f 2.8 maximum aperture translates into an absolute aperture of 54, and the attached photos, all taken wide open, show lots of bokeh and narrow focal planes. For comparison purposes, a full-frame 50mm f 1.2 lens offers a smaller absolute aperture of 42.

KIT: Pentax 645Z with Pentax 67 150mm f 2.8.

[ivanvernon]

Its full name is the HD Pentax-D FA 645 Macro 1:2.8 90mm ED AW SR. I call her my Little Water Princess because I often take her outside in the rain along with the 645Z to capture images such as the one shown in this post. With an absolute aperture of 32, the Little Water Princess shows its "fast lens" characteristics in the images posted here.

Attached Images

View Picture EXIF

File Date

 

View Picture EXIF

File Date

 

View Picture EXIF

File Date

 

View Picture EXIF

File Date

 

View Picture EXIF

File Date

 

View Picture EXIF

File Date

 

View Picture EXIF

File Date

 

[ivanvernon]

Couple shots with 645Z and CZJ Biometar 80mm f 1.8 (Zebra version).

[ivanvernon]

I have just received a used Pentax 67 165mm f 2.8 from a Japanese seller. Here are a few test photos. These were taken in bright sunlight, and came out warmer in tone than expected, maybe a lens characteristic?

[ivanvernon]

Blue skies with K-1 and Pentax 67 165mm f 2.8

[barondla]

Excellent images. Didn't know this club existed until yesterday. I only have 2 Pentax F2.8 MF lenses. The 645 DFA 55 and 67 165 F2.8 ( rubber focus ring model I've used with the 6x7 MLU for years. This picture was taken with the 165 at F2.8 on the Pentax 645Z, using modified 3rd party adapter ( with flocking).

Thanks for looking,
barondla

[barondla]

Its full name is the HD Pentax-D FA 645 Macro 1:2.8 90mm ED AW SR. I call her my Little Water Princess because I often take her outside in the rain along with the 645Z to capture images such as the one shown in this post. With an absolute aperture of 32, the Little Water Princess shows its "fast lens" characteristics in the images posted here.

The water drop images and the gentleman sitting on the porch are my favorites. Nicely done.

Thanks for sharing,
barondla

[ivanvernon]

The water drop images and the gentleman sitting on the porch are my favorites. Nicely done.

Thanks for sharing,
barondla

Thanks for your comments. I was OP on this thread, but have not contributed much lately. I will post something with the Z and P67 75mm f 2.8 tomorrow. The young guy on the porch is my pipeline helper step-son who works all over the country on pipeline construction.

[torashi]

Just found out about this lens club from your recent post on the MF forum. It's a shame I see a lot more P67 activity on fb forums than here.
Regarding the sample images, I must say I prefer the 67 150mm shots with the 645Z over the 67 105/2.4 ones, even though it's not the most highly regarded optic of the system and the latter is known for its mythical status. It's a nice surprise. I really like those pictures. Reasons for this could be overexposure on the 105 ones, like the one of the truck with the 165 and K-1, which I think is not up to par with the other gorgeous ones in the series.
I'd like to know if you used a lens shade with any of them and also the lens versions. Coatings can make a huge difference.

[tuco]

Native format, Pentax 67 105/2.4





400TMY






400TMY @ EI 100