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Nicolas06 · 10-12-2016, 10:52 PM - **1 Like**

Crowned Crane

DA55-300, @300 on K3. Cropped to 380mm

Nicolas06 · 10-12-2016, 10:58 PM

Originally posted by derekkite

Norm, why do you normalize the fstop for DOF? The physical measure of the depth of field is the same on both sensors, what changes is the relative DOF in the field of view. If your bird is in focus, the depth of the subject, no need to close the aperture.

Only with same lens would the physical mesure of deph of field be the same on both sensor... or if you normalize for dof. So f/5.6 APSC is f/9 (not f/8, there a bit more than one stop) on FF.

Still the real question is why would you do that? The interrest of the bigger sensor is better quality at expense of dof. If you need more dof, and quite narrow apperrture an FF and an f/2.8 lens is useless. You could as well have used a 150-450, 50-500 or 150-600 instead with the benefit all the time of much more reach.

And as the 2 image given in example by norm there one with brigter exposure and less noise (apparently it is the FF, but it is not clear). One that is darker exposure,, sharpening applied and more noise (the sharpnening likely has an effect there). My understanding is this second one if the one normhead prefer, mostly due to sharpening and exposure rather than actual noise or gear used. That one if I understand is right is the K3. + DA*200.

Ducatigaz · 10-13-2016, 04:32 AM - **7 Likes**

These were from the car with my K-5/Sigma 500mm F4.5 EX DG/Eckla window mount.

I also checked the shutter count on my K-5 and it's 49,801 loads of life left.

normhead · 10-13-2016, 05:17 AM - **2 Likes**

Originally posted by derekkite

Norm, why do you normalize the fstop for DOF? The physical measure of the depth of field is the same on both sensors, what changes is the relative DOF in the field of view. If your bird is in focus, the depth of the subject, no need to close the aperture.

The issue it you will have wider DoF on a 200mm lens than a 300, I've demonstrated this to myself a number of times. Shooting at the same distance, the 200 will give you more DOF. With these small bird, this close to the lens, DoF is often the determining factor in the acceptability of the image. The vast majority of the images are tossed because the bird does not align parallel to the focal plane leaving som apart of the bird out of focus.

Unless you are going for this look

IN images like this, a very small turn of the head or body will cause part of the bird to be out of focus. The DoF is so thin there is very little room for error, but, being this close is what gets me the detail. This is one of those rare shots when the whole bird is inside the thin DoF. But, if you increase your f-stop you slow your shutter speed, and start losing shots to motion blur. It really is a fine line I'm walking here.

lukulele · 10-13-2016, 06:37 AM - **2 Likes**

Originally posted by Racer X 69

Looks like that one is used for falconry. Notice the leather lace on one of its feet.

Thanks Racer. I never considered that but it looks to be something plant wise as it was dropped five frames later.

**Quartermaster James** · 10-13-2016, 06:52 AM - **2 Likes**

Originally posted by Ducatigaz

These were from the car with my K-5/Sigma 500mm F4.5 EX DG/Eckla window mount.

I also checked the shutter count on my K-5 and it's 49,801 loads of life left.

Nice shots, but what the heck is that last animal?

Ducatigaz · 10-13-2016, 07:10 AM - **1 Like**

Originally posted by Quartermaster James

Nice shots, but what the heck is that last animal?

Yes it does look a bit strange I must admit,. It's a Patagonian mara

**jacamar** · 10-13-2016, 09:24 AM - **1 Like**

I checked our Chilean wildlife guide and it's not in there - apparently it's limited to Argentina. So what on earth was it doing in Blunsdon, Wiltshire, hanging out with the Wheatears?

Ducatigaz · 10-13-2016, 09:36 AM

Originally posted by jacamar

I checked our Chilean wildlife guide and it's not in there - apparently it's limited to Argentina. So what on earth was it doing in Blunsdon, Wiltshire, hanging out with the Wheatears?

Someone in the village has 2 in a field and they keep escaping

biz-engineer · 10-13-2016, 11:02 AM - **5 Likes**

K1 + DFA150-450, square mode. OOC JPEG reversal film style.

tim60 · 10-13-2016, 11:17 AM - **1 Like**

Originally posted by Ducatigaz

Someone in the village has 2 in a field and they keep escaping

For those not in the know, there seem to be lots of people in this region like that.

Kevriano · 10-13-2016, 12:37 PM - **1 Like**

Originally posted by Quartermaster James

Nice shots, but what the heck is that last animal?

It's a Mara

**rgknief60** · 10-13-2016, 12:57 PM - **2 Likes**

:

Originally posted by Quartermaster James

Nice shots, but what the heck is that last animal?

Immature jackalope?

mikeSF · 10-13-2016, 01:36 PM - **8 Likes**

something from Hawai'i

Hi'ilawe Falls
K3II & DFA 150-450

normhead · 10-13-2016, 06:28 PM

Oh ya, you went to Hawaii, rub it in.

10-13-2016, 11:02 AM - 5 Likes	#23515
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,252	K1 + DFA150-450, square mode. OOC JPEG reversal film style. Attached Images Last edited by biz-engineer; 10-13-2016 at 11:08 AM.

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10-12-2016, 10:52 PM - 1 Like	#23506
Nicolas06 Veteran Member Join Date: Nov 2013 Posts: 4,854	Crowned Crane DA55-300, @300 on K3. Cropped to 380mm

10-12-2016, 10:58 PM	#23507
Nicolas06 Veteran Member Join Date: Nov 2013 Posts: 4,854	Originally posted by derekkite Norm, why do you normalize the fstop for DOF? The physical measure of the depth of field is the same on both sensors, what changes is the relative DOF in the field of view. If your bird is in focus, the depth of the subject, no need to close the aperture. Only with same lens would the physical mesure of deph of field be the same on both sensor... or if you normalize for dof. So f/5.6 APSC is f/9 (not f/8, there a bit more than one stop) on FF. Still the real question is why would you do that? The interrest of the bigger sensor is better quality at expense of dof. If you need more dof, and quite narrow apperrture an FF and an f/2.8 lens is useless. You could as well have used a 150-450, 50-500 or 150-600 instead with the benefit all the time of much more reach. And as the 2 image given in example by norm there one with brigter exposure and less noise (apparently it is the FF, but it is not clear). One that is darker exposure,, sharpening applied and more noise (the sharpnening likely has an effect there). My understanding is this second one if the one normhead prefer, mostly due to sharpening and exposure rather than actual noise or gear used. That one if I understand is right is the K3. + DA*200.

10-13-2016, 04:32 AM - 7 Likes	#23508
Ducatigaz Pentaxian Join Date: Feb 2010 Location: Blunsdon,Wiltshire, UK Posts: 1,505	These were from the car with my K-5/Sigma 500mm F4.5 EX DG/Eckla window mount. I also checked the shutter count on my K-5 and it's 49,801 loads of life left.

10-13-2016, 05:17 AM - 2 Likes	#23509
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,451	Originally posted by derekkite Norm, why do you normalize the fstop for DOF? The physical measure of the depth of field is the same on both sensors, what changes is the relative DOF in the field of view. If your bird is in focus, the depth of the subject, no need to close the aperture. The issue it you will have wider DoF on a 200mm lens than a 300, I've demonstrated this to myself a number of times. Shooting at the same distance, the 200 will give you more DOF. With these small bird, this close to the lens, DoF is often the determining factor in the acceptability of the image. The vast majority of the images are tossed because the bird does not align parallel to the focal plane leaving som apart of the bird out of focus. Unless you are going for this look IN images like this, a very small turn of the head or body will cause part of the bird to be out of focus. The DoF is so thin there is very little room for error, but, being this close is what gets me the detail. This is one of those rare shots when the whole bird is inside the thin DoF. But, if you increase your f-stop you slow your shutter speed, and start losing shots to motion blur. It really is a fine line I'm walking here.

10-13-2016, 06:52 AM - 2 Likes	#23511
Quartermaster James Loyal Site Supporter Join Date: Oct 2014 Location: Anchorage, Alaska Posts: 653	Originally posted by Ducatigaz These were from the car with my K-5/Sigma 500mm F4.5 EX DG/Eckla window mount. I also checked the shutter count on my K-5 and it's 49,801 loads of life left. Nice shots, but what the heck is that last animal?

10-13-2016, 07:10 AM - 1 Like	#23512
Ducatigaz Pentaxian Join Date: Feb 2010 Location: Blunsdon,Wiltshire, UK Posts: 1,505	Originally posted by Quartermaster James Nice shots, but what the heck is that last animal? Yes it does look a bit strange I must admit,. It's a Patagonian mara

10-13-2016, 09:24 AM - 1 Like	#23513
jacamar Loyal Site Supporter Join Date: Feb 2011 Location: Toronto Photos: Albums Posts: 3,443	I checked our Chilean wildlife guide and it's not in there - apparently it's limited to Argentina. So what on earth was it doing in Blunsdon, Wiltshire, hanging out with the Wheatears?

10-13-2016, 09:36 AM	#23514
Ducatigaz Pentaxian Join Date: Feb 2010 Location: Blunsdon,Wiltshire, UK Posts: 1,505	Originally posted by jacamar I checked our Chilean wildlife guide and it's not in there - apparently it's limited to Argentina. So what on earth was it doing in Blunsdon, Wiltshire, hanging out with the Wheatears? Someone in the village has 2 in a field and they keep escaping

10-13-2016, 11:17 AM - 1 Like	#23516
tim60 Pentaxian Join Date: Apr 2011 Photos: Albums Posts: 8,758	Originally posted by Ducatigaz Someone in the village has 2 in a field and they keep escaping For those not in the know, there seem to be lots of people in this region like that.

10-13-2016, 12:37 PM - 1 Like	#23517
Kevriano Veteran Member Join Date: May 2016 Location: West Sussex Posts: 472	Originally posted by Quartermaster James Nice shots, but what the heck is that last animal? It's a Mara

10-13-2016, 12:57 PM - 2 Likes	#23518
rgknief60 Site Supporter Join Date: Oct 2009 Photos: Gallery Posts: 983	: Originally posted by Quartermaster James Nice shots, but what the heck is that last animal? Immature jackalope?

10-13-2016, 01:36 PM - 8 Likes	#23519
mikeSF Pentaxian Join Date: Jan 2009 Location: East Bay Area, CA Photos: Gallery Posts: 6,622	something from Hawai'i Hi'ilawe Falls K3II & DFA 150-450

10-13-2016, 06:28 PM	#23520
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,451	Oh ya, you went to Hawaii, rub it in.

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