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**rayallen** · 08-22-2018, 03:34 PM

Originally posted by takis63

An untidy egret...

Having a bad hair day?

takis63 · 08-23-2018, 06:26 AM

Originally posted by rayallen

Having a bad hair day?

takis63 · 08-27-2018, 09:04 AM - **6 Likes**

RAF Atlas C-1 transport (Airbus A-400M)

takis63 · 08-30-2018, 08:34 AM - **3 Likes**

Ukrainian SU-27P Flanker

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irek83 · 10-01-2018, 11:28 AM - **1 Like**

K-1 + Sigma 100-300mm f4 @ 300mm, f4

John Hales · 10-08-2018, 02:01 PM

I have the Sigma 120-400 4.5 - 5.6 APO HSM on a K-1 and the sharpness has been an issue. the last pictures I took were on a tripod and shot with a 2 sec delay. There could have still been some shake I guess. My question has to do with the OS -- the lens has off, 1 or 2. The camera also has OS option. What is the best setting to use? With and without a tripod?

takis63 · 10-20-2018, 09:20 AM - **3 Likes**

A friendly swan in Gialova lagoon in Greece

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**Weevil** · 11-17-2018, 02:15 PM

Originally posted by John Hales

I have the Sigma 120-400 4.5 - 5.6 APO HSM on a K-1 and the sharpness has been an issue. the last pictures I took were on a tripod and shot with a 2 sec delay. There could have still been some shake I guess. My question has to do with the OS -- the lens has off, 1 or 2. The camera also has OS option. What is the best setting to use? With and without a tripod?

With a tripod ALWAYS remove any lens or sensor stabilization (OS or SR)

stabilizers do not like fine vibrations like those generated on a non stable tripod and stabilization would fight against those vibrations...

Without a tripod, the Sigma OS is pretty good, most say it's better than the internal SR or Pentax.
OS position 1 is for full handheld and would correct 2 axis (Horiz + Vert shifts), whereas position 2 would be on a single haxix (vertical), so you should use that only for objects in movement horizontally (like BIF or a moving car, bike, person, etc).

HTH

**mattt** · 11-18-2018, 07:45 PM - **1 Like**

I always use the Pentax IBIS for stabilization. I have played with the Sigma OS but have been using in body so long I am accustomed to its quircks.

The various settings for the Sigma OS are off, normal stabilization, and stabilization for panning (eliminating one axis of stabilization).

I have struggled with sharpness, and really put it through its paces shooting sports and birds. I would offer that wide open the 120-400 is just plain soft. Further to that accurate focus can be a real trick. I have not posted much in this thread, but i'll add a few pics for you.

For example - hand held - f11

Heavy crop out of the centre handheld @ f8

handheld @ f8 with some OK light

Use Pentax TAV mode and don't be scared of higher ISO's - the faster shutter, and stopped down aperture will yield better results than shooting slow.

@ 5.6 but 1/800 shutter speed.

**Weevil** · 11-20-2018, 05:56 PM

Originally posted by mattt

Use Pentax TAV mode and don't be scared of higher ISO's - the faster shutter, and stopped down aperture will yield better results than shooting slow.

+1 (I agree!)

**Kobie** · 01-09-2019, 07:42 AM - **2 Likes**

Sigma 170-500 APO

Northern Harrier

Northern Harriers fighting approx 200 meters out from where I was. This is cropped.

**mattt** · 01-12-2019, 06:36 AM

Originally posted by Kobie

Sigma 170-500 APO

Northern Harrier

Northern Harriers fighting approx 200 meters out from where I was. This is cropped.

Amazing Action!! Cant say I've ever seen on of those around here and we see plenty of raptors along the escarpment. TFS!

**Kobie** · 01-14-2019, 04:27 PM

Originally posted by mattt

Amazing Action!! Cant say I've ever seen on of those around here and we see plenty of raptors along the escarpment. TFS!

Thank you! I've noticed that recently we seem to be getting more variety of Raptors. Close to where I reside, we have Ospreys, a few Falcons, Northern Harriers and I've seen a couple of Juvenile Bald Eagles and one adult Bald Eagle (which sadly flew away from the side of the road because someone blared the horn at the car in front of them when they stopped in disbelief that there was a huge Eagle just sitting on a tree right there at the road). I don't think I've ever been so mad in my life lol.

**NS_Sailor** · 01-20-2019, 08:59 AM - **4 Likes**

Some pics of eagles taken as part of the annual "Eagle Watch" in Sheffield Mills Nova Scotia
Pic's shot with K70 and Sigma Bigma 50-500

**mattt** · 03-17-2019, 08:11 AM

That first frame is terrific!

10-08-2018, 02:01 PM	#936
John Hales Forum Member Join Date: Sep 2012 Photos: Albums Posts: 61	Best OS for a Sigma 120-400 I have the Sigma 120-400 4.5 - 5.6 APO HSM on a K-1 and the sharpness has been an issue. the last pictures I took were on a tripod and shot with a 2 sec delay. There could have still been some shake I guess. My question has to do with the OS -- the lens has off, 1 or 2. The camera also has OS option. What is the best setting to use? With and without a tripod?

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08-22-2018, 03:34 PM	#931
rayallen Site Supporter Join Date: Jul 2007 Location: Forresters Beach, NSW, Australia. Photos: Gallery \| Albums Posts: 3,014	Originally posted by takis63 An untidy egret... Having a bad hair day?

08-23-2018, 06:26 AM	#932
takis63 Veteran Member Join Date: Oct 2014 Photos: Albums Posts: 1,023	Originally posted by rayallen Having a bad hair day?

10-01-2018, 11:28 AM - 1 Like	#935
irek83 Senior Member Join Date: Aug 2016 Location: Dublin Posts: 159	K-1 + Sigma 100-300mm f4 @ 300mm, f4

11-17-2018, 02:15 PM	#938
Weevil Site Supporter Join Date: May 2012 Location: Near Montréal, Québec Photos: Gallery Posts: 4,446 Original Poster	Originally posted by John Hales I have the Sigma 120-400 4.5 - 5.6 APO HSM on a K-1 and the sharpness has been an issue. the last pictures I took were on a tripod and shot with a 2 sec delay. There could have still been some shake I guess. My question has to do with the OS -- the lens has off, 1 or 2. The camera also has OS option. What is the best setting to use? With and without a tripod? With a tripod ALWAYS remove any lens or sensor stabilization (OS or SR) stabilizers do not like fine vibrations like those generated on a non stable tripod and stabilization would fight against those vibrations... Without a tripod, the Sigma OS is pretty good, most say it's better than the internal SR or Pentax. OS position 1 is for full handheld and would correct 2 axis (Horiz + Vert shifts), whereas position 2 would be on a single haxix (vertical), so you should use that only for objects in movement horizontally (like BIF or a moving car, bike, person, etc). HTH

11-18-2018, 07:45 PM - 1 Like	#939
mattt Site Supporter Join Date: Feb 2011 Location: Niagara Photos: Gallery \| Albums Posts: 3,907	I always use the Pentax IBIS for stabilization. I have played with the Sigma OS but have been using in body so long I am accustomed to its quircks. The various settings for the Sigma OS are off, normal stabilization, and stabilization for panning (eliminating one axis of stabilization). I have struggled with sharpness, and really put it through its paces shooting sports and birds. I would offer that wide open the 120-400 is just plain soft. Further to that accurate focus can be a real trick. I have not posted much in this thread, but i'll add a few pics for you. For example - hand held - f11 Heavy crop out of the centre handheld @ f8 handheld @ f8 with some OK light Use Pentax TAV mode and don't be scared of higher ISO's - the faster shutter, and stopped down aperture will yield better results than shooting slow. @ 5.6 but 1/800 shutter speed.

11-20-2018, 05:56 PM	#940
Weevil Site Supporter Join Date: May 2012 Location: Near Montréal, Québec Photos: Gallery Posts: 4,446 Original Poster	Originally posted by mattt Use Pentax TAV mode and don't be scared of higher ISO's - the faster shutter, and stopped down aperture will yield better results than shooting slow. +1 (I agree!)

01-09-2019, 07:42 AM - 2 Likes	#941
Kobie Site Supporter Join Date: Oct 2014 Location: Bowmanville Photos: Albums Posts: 1,211	Sigma 170-500 APO Northern Harrier Northern Harriers fighting approx 200 meters out from where I was. This is cropped.

01-12-2019, 06:36 AM	#942
mattt Site Supporter Join Date: Feb 2011 Location: Niagara Photos: Gallery \| Albums Posts: 3,907	Originally posted by Kobie Sigma 170-500 APO Northern Harrier Northern Harriers fighting approx 200 meters out from where I was. This is cropped. Amazing Action!! Cant say I've ever seen on of those around here and we see plenty of raptors along the escarpment. TFS!

01-14-2019, 04:27 PM	#943
Kobie Site Supporter Join Date: Oct 2014 Location: Bowmanville Photos: Albums Posts: 1,211	Originally posted by mattt Amazing Action!! Cant say I've ever seen on of those around here and we see plenty of raptors along the escarpment. TFS! Thank you! I've noticed that recently we seem to be getting more variety of Raptors. Close to where I reside, we have Ospreys, a few Falcons, Northern Harriers and I've seen a couple of Juvenile Bald Eagles and one adult Bald Eagle (which sadly flew away from the side of the road because someone blared the horn at the car in front of them when they stopped in disbelief that there was a huge Eagle just sitting on a tree right there at the road). I don't think I've ever been so mad in my life lol.

01-20-2019, 08:59 AM - 4 Likes	#944
NS_Sailor Loyal Site Supporter Join Date: Apr 2012 Location: Dartmouth Nova Scotia Canada Photos: Gallery \| Albums Posts: 1,020	Some pics of eagles taken as part of the annual "Eagle Watch" in Sheffield Mills Nova Scotia Pic's shot with K70 and Sigma Bigma 50-500

03-17-2019, 08:11 AM	#945
mattt Site Supporter Join Date: Feb 2011 Location: Niagara Photos: Gallery \| Albums Posts: 3,907	That first frame is terrific!

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