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**pixelsaurus** · 07-23-2019, 04:38 AM

A little bedtime reading on diffraction DIFFRACTION

**microlight** · 07-23-2019, 07:02 AM - **2 Likes**

Great pics, GUB! The first one has hundreds of inverted self-portraits in it!

Originally posted by pixelsaurus

A little bedtime reading on diffraction

My brain hurts...

**zkarj** · 07-24-2019, 01:38 AM - **2 Likes**

Crikey! A bloke takes a bit of a break and you lot all start discussing nuclear physics. Err, pixel shift and dof, at least.

I've tried a few PS images with the KP and although I have no comparison shots, I feel they do exhibit a crispness beyond what I would normally expect. I guess the results will depend heavily on lens choice and configuration, too.

I've just got back from a bit of a road trip (1530km or so in 6 days) and while the KP did get a few outings, an iPhone was appropriate for this particular meeting. Due to circumstances and weather, it wasn't going to be a "photo shoot" kind of visit. Nevertheless, evidence was recorded by my wife. For those unaware/interested, this aircraft has a very special significance for me (hence my online handle which I've been using for about 20 years now).

richandfleur · 07-24-2019, 01:45 AM

Wow, what a cool story!

**zkarj** · 07-24-2019, 01:48 AM

An interesting article, which I bet some here will have some views on.

Goodbye Aberration: Physicist Solves 2,000-Year-Old Optical Problem

**NZ_Ross** · 07-24-2019, 03:15 AM

Originally posted by zkarj

For those unaware/interested, this aircraft has a very special significance for me (hence my online handle which I've been using for about 20 years now).

Enjoyed the story, thanks for the link

Transit · 07-24-2019, 05:12 AM

Gee the old girls looking great zkarj
Great tale !

**microlight** · 07-24-2019, 10:22 AM

Great story, thanks for sharing. Based on your handle, I’d be gbnel - I never owned it, just learned to fly in it.

MarkJerling · 07-24-2019, 03:33 PM

Originally posted by zkarj

Crikey! A bloke takes a bit of a break and you lot all start discussing nuclear physics. Err, pixel shift and dof, at least.

I've tried a few PS images with the KP and although I have no comparison shots, I feel they do exhibit a crispness beyond what I would normally expect. I guess the results will depend heavily on lens choice and configuration, too.

I've just got back from a bit of a road trip (1530km or so in 6 days) and while the KP did get a few outings, an iPhone was appropriate for this particular meeting. Due to circumstances and weather, it wasn't going to be a "photo shoot" kind of visit. Nevertheless, evidence was recorded by my wife. For those unaware/interested, this aircraft has a very special significance for me (hence my online handle which I've been using for about 20 years now).

Cool story Allister! Clearly, ARJ has very special significance for you.

As an aside: What was the plane's original colour?

Arpe · 07-24-2019, 05:18 PM

Originally posted by MarkJerling

Cool story Allister! Clearly, ARJ has very special significance for you.

As an aside: What was the plane's original colour?

It's grey in that early photo!

Yeah great story, it's been around.

richandfleur · 07-24-2019, 06:24 PM

Couple of cool websites for sunset/sunrise planning. Many will have seen but worth sharing just in case.
I like to scope out a few ideas ahead of time if I'm travelling for work and won't have a lot of spare time.

Sunrise & Sunset Calculator for Photography

The Photographer's Ephemeris - Web App

**zkarj** · 07-25-2019, 12:02 AM

Originally posted by MarkJerling

As an aside: What was the plane's original colour?

That kinda depends on the definition of "original." In the time Dad and his mates owned it, it was in the cream and international orange you can see in the photo on my page (and infer in the black and white shot). But originally, it was G-ADLU belonging to the London Aeroplane Club and I'm not sure what their scheme was (I suspect silver), then NZ735 with the RNZAF (when it would have been mostly yellow). I've seen a pic of when it first became ZK-ARJ and it was essentially just the RNZAF scheme with the civil registration added. I'm not sure which owner painted it into the cream and orange, but I am pretty sure it was Cliff Bellingham who gave it essentially the scheme it has today after the rebuild from 1979. While speaking to the current owner, Russ, he mentioned he had "expunged" the green bits which were not to his taste — the mainplane struts at least were a bright green.

Here's a small pic of a "repaint" my brother did in Microsoft Flight Simulator in the cream and orange. Can't find the full sized one at this stage.

**microlight** · 07-25-2019, 01:36 AM

Another Flight Simulator fanatic!

richandfleur · 07-25-2019, 02:07 AM

Anyone aware of any site you can through in a distance to a subject, what sized sensor you have and what field of view/how wide you need it to be to capture your subject, and it will suggest a lens focal length to suit?

Might help with picking a lens in advance of travelling...

**GUB** · 07-25-2019, 04:05 AM

Originally posted by richandfleur

Anyone aware of any site you can through in a distance to a subject, what sized sensor you have and what field of view/how wide you need it to be to capture your subject, and it will suggest a lens focal length to suit?

Might help with picking a lens in advance of travelling...

Even simpler than I thought - scribbled out a lens diagram on paper -- d = subject distance from centre of lens w = required width of subject s = width of sensor
Then focal length required = d x s / w
d and w need to be the same unit (metres) and fl and s need to be same units (mm)
So a subject 3 metres wide 4 metres away - use 32mm on apsc and 48mm on FF
Someone check my geometry.

07-25-2019, 12:02 AM	#16122
zkarj Site Supporter Join Date: Jan 2009 Location: Wellington Posts: 1,292	Originally posted by MarkJerling As an aside: What was the plane's original colour? That kinda depends on the definition of "original." In the time Dad and his mates owned it, it was in the cream and international orange you can see in the photo on my page (and infer in the black and white shot). But originally, it was G-ADLU belonging to the London Aeroplane Club and I'm not sure what their scheme was (I suspect silver), then NZ735 with the RNZAF (when it would have been mostly yellow). I've seen a pic of when it first became ZK-ARJ and it was essentially just the RNZAF scheme with the civil registration added. I'm not sure which owner painted it into the cream and orange, but I am pretty sure it was Cliff Bellingham who gave it essentially the scheme it has today after the rebuild from 1979. While speaking to the current owner, Russ, he mentioned he had "expunged" the green bits which were not to his taste — the mainplane struts at least were a bright green. Here's a small pic of a "repaint" my brother did in Microsoft Flight Simulator in the cream and orange. Can't find the full sized one at this stage. Attached Images Last edited by zkarj; 07-25-2019 at 01:23 AM.

07-25-2019, 04:05 AM	#16125
GUB Loyal Site Supporter Join Date: Aug 2012 Location: Wanganui Photos: Gallery \| Albums Posts: 5,762	Originally posted by richandfleur Anyone aware of any site you can through in a distance to a subject, what sized sensor you have and what field of view/how wide you need it to be to capture your subject, and it will suggest a lens focal length to suit? Might help with picking a lens in advance of travelling... Even simpler than I thought - scribbled out a lens diagram on paper -- d = subject distance from centre of lens w = required width of subject s = width of sensor Then focal length required = d x s / w d and w need to be the same unit (metres) and fl and s need to be same units (mm) So a subject 3 metres wide 4 metres away - use 32mm on apsc and 48mm on FF Someone check my geometry. Last edited by GUB; 07-25-2019 at 04:22 AM.

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07-23-2019, 04:38 AM	#16111
pixelsaurus Site Supporter Join Date: Jul 2007 Location: Te Kuiti, NZ Photos: Gallery \| Albums Posts: 986	A little bedtime reading on diffraction DIFFRACTION

07-23-2019, 07:02 AM - 2 Likes	#16112
microlight Site Supporter Join Date: Sep 2011 Location: Hampshire, UK Posts: 2,129	Great pics, GUB! The first one has hundreds of inverted self-portraits in it! Originally posted by pixelsaurus A little bedtime reading on diffraction My brain hurts...

07-24-2019, 01:45 AM	#16114
richandfleur Pentaxian Join Date: Mar 2014 Location: Palmerston North, New Zealand Photos: Albums Posts: 1,788	Wow, what a cool story!

07-24-2019, 01:48 AM	#16115
zkarj Site Supporter Join Date: Jan 2009 Location: Wellington Posts: 1,292	An interesting article, which I bet some here will have some views on. Goodbye Aberration: Physicist Solves 2,000-Year-Old Optical Problem

07-24-2019, 03:15 AM	#16116
NZ_Ross Kiwi Pentaxian Join Date: Mar 2012 Location: Timaru Photos: Gallery \| Albums Posts: 4,225	Originally posted by zkarj For those unaware/interested, this aircraft has a very special significance for me (hence my online handle which I've been using for about 20 years now). Enjoyed the story, thanks for the link

07-24-2019, 05:12 AM	#16117
Transit Pentaxian Join Date: Aug 2007 Location: Whanganui NZ Photos: Gallery \| Albums Posts: 4,624	Gee the old girls looking great zkarj Great tale !

07-24-2019, 10:22 AM	#16118
microlight Site Supporter Join Date: Sep 2011 Location: Hampshire, UK Posts: 2,129	Great story, thanks for sharing. Based on your handle, I’d be gbnel - I never owned it, just learned to fly in it.

07-24-2019, 03:33 PM	#16119
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,423	Originally posted by zkarj Crikey! A bloke takes a bit of a break and you lot all start discussing nuclear physics. Err, pixel shift and dof, at least. I've tried a few PS images with the KP and although I have no comparison shots, I feel they do exhibit a crispness beyond what I would normally expect. I guess the results will depend heavily on lens choice and configuration, too. I've just got back from a bit of a road trip (1530km or so in 6 days) and while the KP did get a few outings, an iPhone was appropriate for this particular meeting. Due to circumstances and weather, it wasn't going to be a "photo shoot" kind of visit. Nevertheless, evidence was recorded by my wife. For those unaware/interested, this aircraft has a very special significance for me (hence my online handle which I've been using for about 20 years now). Cool story Allister! Clearly, ARJ has very special significance for you. As an aside: What was the plane's original colour?

07-24-2019, 05:18 PM	#16120
Arpe Pentaxian Join Date: Sep 2006 Location: New Zealand Photos: Gallery \| Albums Posts: 4,452	Originally posted by MarkJerling Cool story Allister! Clearly, ARJ has very special significance for you. As an aside: What was the plane's original colour? It's grey in that early photo! Yeah great story, it's been around.

07-24-2019, 06:24 PM	#16121
richandfleur Pentaxian Join Date: Mar 2014 Location: Palmerston North, New Zealand Photos: Albums Posts: 1,788	Couple of cool websites for sunset/sunrise planning. Many will have seen but worth sharing just in case. I like to scope out a few ideas ahead of time if I'm travelling for work and won't have a lot of spare time. Sunrise & Sunset Calculator for Photography The Photographer's Ephemeris - Web App

07-25-2019, 01:36 AM	#16123
microlight Site Supporter Join Date: Sep 2011 Location: Hampshire, UK Posts: 2,129	Another Flight Simulator fanatic!

07-25-2019, 02:07 AM	#16124
richandfleur Pentaxian Join Date: Mar 2014 Location: Palmerston North, New Zealand Photos: Albums Posts: 1,788	Anyone aware of any site you can through in a distance to a subject, what sized sensor you have and what field of view/how wide you need it to be to capture your subject, and it will suggest a lens focal length to suit? Might help with picking a lens in advance of travelling...

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