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Ralf R Radermacher

Tue, Jul 29, 2025 6:11 PM

Am 29.07.25 um 19:07 schrieb Bob W PDML:

Micro-four-thirds.

Ah, I'm obviously too old and too Pentax fixated. I know M42 but M43 was
new to me.

Ralf

--
Ralf R. Radermacher - Köln/Cologne, Germany
Blog :http://the-real-fotoralf.blogspot.com
Audio :http://aporee.org/maps/projects/fotoralf
Fotos :https://www.fotocommunity.de/user_photos/770012

Am 29.07.25 um 19:07 schrieb Bob W PDML: > Micro-four-thirds. Ah, I'm obviously too old and too Pentax fixated. I know M42 but M43 was new to me. Ralf -- Ralf R. Radermacher - Köln/Cologne, Germany Blog :http://the-real-fotoralf.blogspot.com Audio :http://aporee.org/maps/projects/fotoralf Fotos :https://www.fotocommunity.de/user_photos/770012

GD

Godfrey DiGiorgi

Tue, Jul 29, 2025 6:41 PM

On Jul 29, 2025, at 10:23 AM, Bob W PDML pdmlbw@icloud.com wrote:

On 29 Jul 2025, at 16:38, Godfrey DiGiorgi godfreydigiorgi@me.com wrote:

Hi BobW!

Thanks! Yes, the Heliar Classic 50/1.5 VM is really nice ... I especially like how the blur progresses both in front of and behind the focus plane. Its behavior and rendering reminds me a lot of the 1972 Summilux 35mm f/1.4 (pre-ASPH), one of my most prized and used lenses.

I have one of those, made in 1994 according to the serial number. It looks very nice and is easy to use attached to my recently-acquired LUMIX S5, so I may take it with me, along with my Pentax K 50/1.2, on a forthcoming trip for times when I need something smaller and faster than the honking great big 24-105/4 that will be most used.

https://share.icloud.com/photos/0b7BGx6yzaOkyrvsk5kbkcnJA

Nice! :D

G
—
"We all get to be young and foolish in our lives.
If we survive that, we get to be old and foolish."

> On Jul 29, 2025, at 10:23 AM, Bob W PDML <pdmlbw@icloud.com> wrote: >> >> On 29 Jul 2025, at 16:38, Godfrey DiGiorgi <godfreydigiorgi@me.com> wrote: >> >> Hi BobW! >> >> Thanks! Yes, the Heliar Classic 50/1.5 VM is really nice ... I especially like how the blur progresses both in front of and behind the focus plane. Its behavior and rendering reminds me a lot of the 1972 Summilux 35mm f/1.4 (pre-ASPH), one of my most prized and used lenses. > > I have one of those, made in 1994 according to the serial number. It looks very nice and is easy to use attached to my recently-acquired LUMIX S5, so I may take it with me, along with my Pentax K 50/1.2, on a forthcoming trip for times when I need something smaller and faster than the honking great big 24-105/4 that will be most used. > > https://share.icloud.com/photos/0b7BGx6yzaOkyrvsk5kbkcnJA Nice! :D G — "We all get to be young and foolish in our lives. If we survive that, we get to be old and foolish."

LC

Larry Colen

Tue, Jul 29, 2025 6:45 PM

My preferred abbreviation for micro four thirds is u43, or maybe u4/3,
belying my sciency background.

On 2025-07-29 11:11, Ralf R Radermacher wrote:

Am 29.07.25 um 19:07 schrieb Bob W PDML:

Micro-four-thirds.

Ah, I'm obviously too old and too Pentax fixated. I know M42 but M43
was new to me.

Ralf

--
Larry Colen LRC@red4est.com http://red4est.com/lrc

My preferred abbreviation for micro four thirds is u43, or maybe u4/3, belying my sciency background. On 2025-07-29 11:11, Ralf R Radermacher wrote: > Am 29.07.25 um 19:07 schrieb Bob W PDML: >> Micro-four-thirds. > > Ah, I'm obviously too old and too Pentax fixated. I know M42 but M43 > was new to me. > > Ralf -- Larry Colen LRC@red4est.com http://red4est.com/lrc

GD

Godfrey DiGiorgi

Tue, Jul 29, 2025 11:05 PM

On Jul 29, 2025, at 11:45 AM, Larry Colen lrc@red4est.com wrote:
My preferred abbreviation for micro four thirds is u43, or maybe u4/3, belying my sciency background.

On 2025-07-29 11:11, Ralf R Radermacher wrote:

Am 29.07.25 um 19:07 schrieb Bob W PDML:

Micro-four-thirds.

Ah, I'm obviously too old and too Pentax fixated. I know M42 but M43
was new to me.

What I've seen, over the years since it was introduced (~2009), on the various forae specializing in these cameras is that the the name of the format is usually spelled out as micro-FourThirds with a 'most common' abbreviation of mFT. µ43 or µ4/3 are both reasonable too, but most people don't care to look up where the Greek "mu" (µ) character is on their keyboards.

The proper full name, according to Olympus and Panasonic, is "Micro Four Thirds" with capitalization, but the only place I've seen that used is in their operating manuals for their various cameras or in some magazines' editorial verbiage.

G
—
"No matter where you go, there you are."

> On Jul 29, 2025, at 11:45 AM, Larry Colen <lrc@red4est.com> wrote: > My preferred abbreviation for micro four thirds is u43, or maybe u4/3, belying my sciency background. > > On 2025-07-29 11:11, Ralf R Radermacher wrote: > >> Am 29.07.25 um 19:07 schrieb Bob W PDML: >>> Micro-four-thirds. >> >> Ah, I'm obviously too old and too Pentax fixated. I know M42 but M43 >> was new to me. What I've seen, over the years since it was introduced (~2009), on the various forae specializing in these cameras is that the the name of the format is usually spelled out as micro-FourThirds with a 'most common' abbreviation of mFT. µ43 or µ4/3 are both reasonable too, but most people don't care to look up where the Greek "mu" (µ) character is on their keyboards. The proper full name, according to Olympus and Panasonic, is "Micro Four Thirds" with capitalization, but the only place I've seen that used is in their operating manuals for their various cameras or in some magazines' editorial verbiage. G — "No matter where you go, there you are."

pdml@pdml.net

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