Micro Four Thirds Club

**WPRESTO** · 07-08-2018, 01:07 PM

Originally posted by Tonytee

Hello Walt. I have been meaning to ask if you had ever taught at M.I.T. ? Thnx, Tony

No. That's all engineering, and I'm all organismic biology + a smattering of geology (primarily "soft rock" = sedimentary).

**UncleVanya** · 07-08-2018, 06:39 PM - **2 Likes**

I really liked these from today:

More in this album:
July 8th 2018 | Flickr

**zippythezip** · 07-08-2018, 08:16 PM - **1 Like**

Welcome to Nova Scotia, Lumix 14-140II

**Tonytee** · 07-08-2018, 09:28 PM

Originally posted by WPRESTO

No. That's all engineering, and I'm all organismic biology + a smattering of geology (primarily "soft rock" = sedimentary).

I see. I know all about "Soft Rock." In fact I have one firmly planted on my neck.

(

Actually, M.I.T. has had a world recognized Psych., department for over 40 years now.

Thnx.

TT

**WPRESTO** · 07-09-2018, 05:47 AM - **1 Like**

Peering through the display window into a long-closed store in a ghost town (Silver City, Idaho). Pretty much impossible to avoid all reflections from the window as the sun was shining directly onto it. Samyang fish-eye on Oly OMD 10 mk II

yorik · 07-12-2018, 04:41 PM - **3 Likes**

Jack is a bit more neurotic than the average yappy dog. Panasonic GX7+P20

**UncleVanya** · 07-12-2018, 04:42 PM

Originally posted by yorik

Jack is a bit more neurotic than the average yappy dog. Panasonic GX7+P20

Oh my god that's priceless!

**WPRESTO** · 07-12-2018, 07:51 PM - **2 Likes**

A dew-covered leafhopper from this morning. Oly OMD10 mkII + Sigma 150mm macro via speed booster adapter.

**UncleVanya** · 07-12-2018, 07:58 PM

Originally posted by WPRESTO

A dew-covered leafhopper from this morning. Oly OMD10 mkII + Sigma 150mm macro via speed booster adapter.

Which speed booster are you using?

**WPRESTO** · 07-13-2018, 04:12 AM

Originally posted by UncleVanya

Which speed booster are you using?

Hang on and I'll check so I get the name preciesly correct.

**WPRESTO** · 07-13-2018, 04:24 AM - **1 Like**

METABONES ULTRA 0.71X

I originally mounted the Sigma using a no-glass adapter, but then I read several independent reviews each of which said they found that the 0.71X Ultra 1) improved resolution; 2) improved contrast; and also, of course, because this devise concentrates light, as opposed to spreading as a TC does, you actually gain one f-stop in brightness. The lens does not "become" an f2, but the concentration of light increases brightness such that you pick up one f-stop or shutter speed in any given light intensity. A downside, when the Sigma is attached using the glassless adapter, the FOV is equivalent to 300mm on a FF camera. (of course by using the smaller MFT sensor you are actually cropping the FOV). When the 0,71X is used, the FOV is equivalent to a 210mm lens used on a FF sensor.

**UncleVanya** · 07-13-2018, 07:30 AM

Originally posted by WPRESTO

METABONES ULTRA 0.71X

I originally mounted the Sigma using a no-glass adapter, but then I read several independent reviews each of which said they found that the 0.71X Ultra 1) improved resolution; 2) improved contrast; and also, of course, because this devise concentrates light, as opposed to spreading as a TC does, you actually gain one f-stop in brightness. The lens does not "become" an f2, but the concentration of light increases brightness such that you pick up one f-stop or shutter speed in any given light intensity. A downside, when the Sigma is attached using the glassless adapter, the FOV is equivalent to 300mm on a FF camera. (of course by using the smaller MFT sensor you are actually cropping the FOV). When the 0,71X is used, the FOV is equivalent to a 210mm lens used on a FF sensor.

It should become f2 since the focal length was reduced while the aperture opening remained the same. Very interesting thanks for the details.

**WPRESTO** · 07-13-2018, 02:31 PM - **3 Likes**

Testing my new Pany 50~200mm on a few random subjects. About 40% of frame cropped off this image.

northcoastgreg · 07-14-2018, 01:46 PM - **2 Likes**

Silos near Port Orford, Oregon, shot with E-M5ii and Pany 12-60:

**WPRESTO** · 07-14-2018, 03:27 PM - **1 Like**

Derelict grain elevator, Gooding, Idaho.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
comparing adapters for Micro Four Thirds (MFT)	rparmar	Canon, Nikon, Sony, and Other Camera Brands	25	08-09-2011 10:01 PM
Kr/Kx or Micro Four Thirds	snowfreak	Troubleshooting and Beginner Help	16	07-18-2011 01:12 PM
Leica 25mm f/1.4 for Micro Four Thirds	jct us101	Canon, Nikon, Sony, and Other Camera Brands	3	06-13-2011 05:46 AM
Pentax seriously considering joining Micro Four Thirds?	iht	Pentax News and Rumors	2	04-30-2010 11:49 PM

07-08-2018, 01:07 PM	#2311
WPRESTO Loyal Site Supporter Join Date: Aug 2010 Location: Massachusetts Photos: Gallery \| Albums Posts: 59,137	Originally posted by Tonytee Hello Walt. I have been meaning to ask if you had ever taught at M.I.T. ? Thnx, Tony No. That's all engineering, and I'm all organismic biology + a smattering of geology (primarily "soft rock" = sedimentary).

07-08-2018, 06:39 PM - 2 Likes	#2312
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,445	I really liked these from today: More in this album: July 8th 2018 \| Flickr

07-08-2018, 08:16 PM - 1 Like	#2313
zippythezip Site Supporter Join Date: May 2014 Location: Springhill Nova Scotia Photos: Gallery \| Albums Posts: 397	Welcome to Nova Scotia, Lumix 14-140II

07-08-2018, 09:28 PM	#2314
Tonytee Loyal Site Supporter Join Date: Jul 2012 Photos: Gallery \| Albums Posts: 21,502	Originally posted by WPRESTO No. That's all engineering, and I'm all organismic biology + a smattering of geology (primarily "soft rock" = sedimentary). I see. I know all about "Soft Rock." In fact I have one firmly planted on my neck. ( Actually, M.I.T. has had a world recognized Psych., department for over 40 years now. Thnx. TT

07-12-2018, 04:41 PM - 3 Likes	#2316
yorik Veteran Member Join Date: Jan 2012 Location: Scotts Valley, CA Photos: Gallery Posts: 991	Jack is a bit more neurotic than the average yappy dog. Panasonic GX7+P20

07-12-2018, 04:42 PM	#2317
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,445	Originally posted by yorik Jack is a bit more neurotic than the average yappy dog. Panasonic GX7+P20 Oh my god that's priceless!

07-12-2018, 07:58 PM	#2319
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,445	Originally posted by WPRESTO A dew-covered leafhopper from this morning. Oly OMD10 mkII + Sigma 150mm macro via speed booster adapter. Which speed booster are you using?

07-13-2018, 04:12 AM	#2320
WPRESTO Loyal Site Supporter Join Date: Aug 2010 Location: Massachusetts Photos: Gallery \| Albums Posts: 59,137	Originally posted by UncleVanya Which speed booster are you using? Hang on and I'll check so I get the name preciesly correct.

07-13-2018, 04:24 AM - 1 Like	#2321
WPRESTO Loyal Site Supporter Join Date: Aug 2010 Location: Massachusetts Photos: Gallery \| Albums Posts: 59,137	METABONES ULTRA 0.71X I originally mounted the Sigma using a no-glass adapter, but then I read several independent reviews each of which said they found that the 0.71X Ultra 1) improved resolution; 2) improved contrast; and also, of course, because this devise concentrates light, as opposed to spreading as a TC does, you actually gain one f-stop in brightness. The lens does not "become" an f2, but the concentration of light increases brightness such that you pick up one f-stop or shutter speed in any given light intensity. A downside, when the Sigma is attached using the glassless adapter, the FOV is equivalent to 300mm on a FF camera. (of course by using the smaller MFT sensor you are actually cropping the FOV). When the 0,71X is used, the FOV is equivalent to a 210mm lens used on a FF sensor.

07-13-2018, 07:30 AM	#2322
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,445	Originally posted by WPRESTO METABONES ULTRA 0.71X I originally mounted the Sigma using a no-glass adapter, but then I read several independent reviews each of which said they found that the 0.71X Ultra 1) improved resolution; 2) improved contrast; and also, of course, because this devise concentrates light, as opposed to spreading as a TC does, you actually gain one f-stop in brightness. The lens does not "become" an f2, but the concentration of light increases brightness such that you pick up one f-stop or shutter speed in any given light intensity. A downside, when the Sigma is attached using the glassless adapter, the FOV is equivalent to 300mm on a FF camera. (of course by using the smaller MFT sensor you are actually cropping the FOV). When the 0,71X is used, the FOV is equivalent to a 210mm lens used on a FF sensor. It should become f2 since the focal length was reduced while the aperture opening remained the same. Very interesting thanks for the details.

07-14-2018, 01:46 PM - 2 Likes	#2324
northcoastgreg Pentaxian Join Date: Feb 2010 Location: Northern Michigan Photos: Gallery \| Albums Posts: 6,174	Silos near Port Orford, Oregon, shot with E-M5ii and Pany 12-60: