2017 PF T-shirts are Now on Sale!

gkopeliadis · 07-10-2008, 11:03 AM

After a long-long time, my K10D- MACRO 105mm F2.8 EX DG duet are back in business with me out on the fields. The truth is that even I own the Sigma for over 2 months now, I rarely used it. So I learn it now and I have to cope with the paper-thin DOF ...

Any advise?

Blue · 07-10-2008, 12:42 PM

You can play with the aperture to help with the DOF. However, you may end up needing a macro flash due to reduced light reaching the ccd. To me, the DOF is just part of macro regardless of whether it is a Tamron, pentax, or sigma lens.

ivoire · 07-10-2008, 02:38 PM

I agree with Blue. A smaller aperature is what you need for greater dof and a ring or off camera flash will most likely be needed.

little laker · 07-10-2008, 05:29 PM

gkopeliadis,
The narrow DOF works pretty good with this image, especially after a little processing

I hope that you don't mind, but I lightened the shadows a little, then bumped the contrast a hair. In my opinion helping draw out the colours.

Oh, I rarely do, but I sharpened it a little as well.

axl · 07-11-2008, 12:26 AM

No offence, it's a nice shot, but I like the PPed version better. The original is bit dark....
But keep trying, macro is fun, but it's hard to get it right (my own experience :-( )

cupic · 07-11-2008, 03:10 AM

Originally posted by little laker

gkopeliadis,
The narrow DOF works pretty good with this image, especially after a little processing

I hope that you don't mind, but I lightened the shadows a little, then bumped the contrast a hair. In my opinion helping draw out the colours.
Oh, I rarely do, but I sharpened it a little as well.

I love it a bump ; a little : and a little processing . and viola presto image magic

cheers

roentarre · 07-11-2008, 05:09 AM

A little dark. A great post.

gkopeliadis · 07-14-2008, 01:13 AM

Originally posted by roentarre

A little dark...

The problem was that I used Center Weighted metering instead of the proper spot metering. I'll know next time

I also noticed that even up to 1/750speed there is diference in clarity when I use a tripod (in macro).

marcusyoung · 07-14-2008, 07:07 AM

shot this in singapore, the same insect.....huge..probably three inches in length.

A200 macro.

marcus

Peter Zack · 07-14-2008, 07:13 AM

The narrow DOF is just a fact of life and at any speed a tripod is a must to lock the focus on the spot you want it on. Macros take some practice but well worth the effort. They really force you to take your time.

gkopeliadis · 07-14-2008, 07:29 AM

Originally posted by marcusyoung

shot this in singapore, the same insect.....huge..probably three inches in length.

Whow! Amazing. I new that there is a great variety of this species but never imagined something so colorfull. Mediterranean kind is smaller (2-3cm) and much-much duller (obviously!)

.

marcusyoung · 07-14-2008, 07:30 AM

Originally posted by Peter Zack

The narrow DOF is just a fact of life and at any speed a tripod is a must to lock the focus on the spot you want it on. Macros take some practice but well worth the effort. They really force you to take your time.

tripod is essential for still life or stationary subject. For moving insects, monopods would be more mobile and flexible to move around. For other elements of wind,....... higher shutter speed with the use of flash to freeze the insects. whether it is f4 or f8, the depth of field is still very narrow for 1:1 magnification. Got to hold the breadth for that short moment when trigering the shutter, to prevent camera shake.

marcus

Blue · 07-14-2008, 08:33 AM

There are several hundred species of Cicadas. We have several species here in the states that take 17 years to complete their life-cycle and another group that take 13-years. They are often called 17 year and 13 year Cicadas respectively. Regular one just take a mere 3 to 7 years.

Edit: Wikepeida has a decent article on them. Cicada - Wikipedia, the free encyclopedia

07-10-2008, 11:03 AM	#1
gkopeliadis Veteran Member Join Date: Mar 2008 Location: ATHENS, GREECE Posts: 311	Cicada meets SIGMA 105 After a long-long time, my K10D- MACRO 105mm F2.8 EX DG duet are back in business with me out on the fields. The truth is that even I own the Sigma for over 2 months now, I rarely used it. So I learn it now and I have to cope with the paper-thin DOF ... Any advise?

07-14-2008, 07:07 AM	#9
marcusyoung Pentaxian Join Date: May 2007 Location: singapore Photos: Gallery \| Albums Posts: 1,091	cicada? shot this in singapore, the same insect.....huge..probably three inches in length. A200 macro. marcus

07-14-2008, 07:29 AM	#11
gkopeliadis Veteran Member Join Date: Mar 2008 Location: ATHENS, GREECE Posts: 311 Original Poster	Originally posted by marcusyoung shot this in singapore, the same insect.....huge..probably three inches in length. Whow! Amazing. I new that there is a great variety of this species but never imagined something so colorfull. Mediterranean kind is smaller (2-3cm) and much-much duller (obviously!).

Thread Tools	Search this Thread
Show Printable Version E-mail to a Friend	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Sigma 28-105 F2.8-4.0	mickey	Pentax SLR Lens Discussion	9	07-08-2009 08:31 PM
Vivitar S1 105 VS Sigma EX 105	OrenMc	Pentax SLR Lens Discussion	12	04-28-2009 08:35 AM
When K20D meets Sigma 18-200mm	dsport	Post Your Photos!	22	12-05-2008 07:30 AM
Sigma 10-20 and Sigma 105 macro...	leadbelly	Pentax SLR Lens Discussion	8	01-31-2008 09:36 PM
For Sale - Sold: FS: Sigma 24-135 F2.8-4.5, Sigma 28-105 F4-5.6, TOU/FIVESTAR MC 70-200 F4 m	ramzey	Sold Items	2	12-31-2007 03:03 AM

07-10-2008, 12:42 PM	#2
Blue Moderator Site Supporter Join Date: Jun 2008 Location: Florida Hill Country Photos: Gallery \| Albums Posts: 17,212	You can play with the aperture to help with the DOF. However, you may end up needing a macro flash due to reduced light reaching the ccd. To me, the DOF is just part of macro regardless of whether it is a Tamron, pentax, or sigma lens.

07-10-2008, 02:38 PM	#3
ivoire Pentaxian Join Date: Mar 2007 Location: chicago burbs Photos: Gallery Posts: 3,368	I agree with Blue. A smaller aperature is what you need for greater dof and a ring or off camera flash will most likely be needed.

07-10-2008, 05:29 PM	#4
little laker Veteran Member Join Date: Sep 2006 Photos: Gallery Posts: 5,713	gkopeliadis, The narrow DOF works pretty good with this image, especially after a little processing I hope that you don't mind, but I lightened the shadows a little, then bumped the contrast a hair. In my opinion helping draw out the colours. Oh, I rarely do, but I sharpened it a little as well.

07-11-2008, 12:26 AM	#5
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,181	No offence, it's a nice shot, but I like the PPed version better. The original is bit dark.... But keep trying, macro is fun, but it's hard to get it right (my own experience :-( )

07-11-2008, 03:10 AM	#6
cupic Veteran Member Join Date: Apr 2008 Location: Australia-NSW Photos: Gallery Posts: 4,739	Originally posted by little laker gkopeliadis, The narrow DOF works pretty good with this image, especially after a little processing I hope that you don't mind, but I lightened the shadows a little, then bumped the contrast a hair. In my opinion helping draw out the colours. Oh, I rarely do, but I sharpened it a little as well. I love it a bump ; a little : and a little processing . and viola presto image magic cheers

07-11-2008, 05:09 AM	#7
roentarre Veteran Member Join Date: Oct 2006 Location: Melbourne, Australia Posts: 11,794	A little dark. A great post.

07-14-2008, 01:13 AM	#8
gkopeliadis Veteran Member Join Date: Mar 2008 Location: ATHENS, GREECE Posts: 311 Original Poster	Originally posted by roentarre A little dark... The problem was that I used Center Weighted metering instead of the proper spot metering. I'll know next time I also noticed that even up to 1/750speed there is diference in clarity when I use a tripod (in macro).

07-14-2008, 07:13 AM	#10
Peter Zack Pentaxian Moderator Emeritus Join Date: May 2007 Location: Edmonton Alberta, Canada Photos: Gallery \| Albums Posts: 10,648	The narrow DOF is just a fact of life and at any speed a tripod is a must to lock the focus on the spot you want it on. Macros take some practice but well worth the effort. They really force you to take your time.

07-14-2008, 07:30 AM	#12
marcusyoung Pentaxian Join Date: May 2007 Location: singapore Photos: Gallery \| Albums Posts: 1,091	Originally posted by Peter Zack The narrow DOF is just a fact of life and at any speed a tripod is a must to lock the focus on the spot you want it on. Macros take some practice but well worth the effort. They really force you to take your time. tripod is essential for still life or stationary subject. For moving insects, monopods would be more mobile and flexible to move around. For other elements of wind,....... higher shutter speed with the use of flash to freeze the insects. whether it is f4 or f8, the depth of field is still very narrow for 1:1 magnification. Got to hold the breadth for that short moment when trigering the shutter, to prevent camera shake. marcus

07-14-2008, 08:33 AM	#13
Blue Moderator Site Supporter Join Date: Jun 2008 Location: Florida Hill Country Photos: Gallery \| Albums Posts: 17,212	There are several hundred species of Cicadas. We have several species here in the states that take 17 years to complete their life-cycle and another group that take 13-years. They are often called 17 year and 13 year Cicadas respectively. Regular one just take a mere 3 to 7 years. Edit: Wikepeida has a decent article on them. Cicada - Wikipedia, the free encyclopedia

Cicada meets SIGMA 105

2017 PF T-shirts are Now on Sale!