Supplies of the Ship Modeler's Handbook are running out. Get your copy NOW before they are gone! Click on photo to order.
×
bartley
-
Posts
424 -
Joined
-
Last visited
Reputation Activity
-
bartley got a reaction from mtaylor in Focus Stacking
The problem is, Glenn, that theory is not always born out in practice. Your Nikon is changing the focusing point gradually during the collection of the images. Theoretically the size of an image should not change as you change the focus but manufacturing tolerances of the lens and other factors result in what is called "focus breathing" , This means that the focal length changes very slightly as you change the focus, hence the size of the image. One of the lens elements has to move to change the focus and it is almost impossible to do this without effecting other elements. This effect is, of course, dependent on the lens design. The real question is would you notice it? Probably not in everyday general work, such as the photo you describe of Cheerful, but in technical photography it becomes very important.
John
-
bartley got a reaction from wefalck in Focus Stacking
You are quite correct, Justine. There are many scientific applications of focus stacking and we always use a rail to do this. Changing the focal point, especially with a zoom lens, causes a marginal change in size and so greater demands are placed on the software. Even so the quality suffers especially at the edges of the frame. You may interested to know that in medical imaging and in forensic applications we take multiple images and then use mathematical functions to look for differences between images.
John
-
bartley got a reaction from mtaylor in Focus Stacking
You are quite correct, Justine. There are many scientific applications of focus stacking and we always use a rail to do this. Changing the focal point, especially with a zoom lens, causes a marginal change in size and so greater demands are placed on the software. Even so the quality suffers especially at the edges of the frame. You may interested to know that in medical imaging and in forensic applications we take multiple images and then use mathematical functions to look for differences between images.
John
-
bartley got a reaction from Justin P. in Focus Stacking
You are quite correct, Justine. There are many scientific applications of focus stacking and we always use a rail to do this. Changing the focal point, especially with a zoom lens, causes a marginal change in size and so greater demands are placed on the software. Even so the quality suffers especially at the edges of the frame. You may interested to know that in medical imaging and in forensic applications we take multiple images and then use mathematical functions to look for differences between images.
John
-
bartley got a reaction from druxey in Focus Stacking
You are quite correct, Justine. There are many scientific applications of focus stacking and we always use a rail to do this. Changing the focal point, especially with a zoom lens, causes a marginal change in size and so greater demands are placed on the software. Even so the quality suffers especially at the edges of the frame. You may interested to know that in medical imaging and in forensic applications we take multiple images and then use mathematical functions to look for differences between images.
John
-
bartley got a reaction from Rik Thistle in The Kriegstein Collection
It is good that you are able to deal with them. WE have a problem in Australia with Amazon , Google and Facebook. They refuse to pay our income tax for business they do here and will not pay our media companies for the news that they use. So most of us use alternatives which in the case of Amazon are not so extensive.
John
-
bartley got a reaction from mtaylor in The Kriegstein Collection
It is good that you are able to deal with them. WE have a problem in Australia with Amazon , Google and Facebook. They refuse to pay our income tax for business they do here and will not pay our media companies for the news that they use. So most of us use alternatives which in the case of Amazon are not so extensive.
John
-
bartley got a reaction from AnobiumPunctatum in The Kriegstein Collection
It is good that you are able to deal with them. WE have a problem in Australia with Amazon , Google and Facebook. They refuse to pay our income tax for business they do here and will not pay our media companies for the news that they use. So most of us use alternatives which in the case of Amazon are not so extensive.
John
-
bartley got a reaction from GrandpaPhil in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 69: Installation of the Topmast Yard
The first task was to attach the truss, which was seized around the mast to hold the yard in place. Attachment of the halyard was straightforward. A hook was seized to a length of 0.63 mm rope which was attached to the sling.
It was then led down to a tackle on the starboard side which was an exact mirror image of the topping lift tackle on the port side:
Aligning the yard proved more difficult than I thought. First I fitted the clue lines and sheets since these were the inner ropes. I then used the tension on these to establish the correct angle for the yard. However since these also connect to the main yard tenshioning of these caused movement of both yards.
So in the end I left these slack while I adjusted the angle with the lifts and braces and the re-tenshioned the sheets and clue lines quite loosely later.
My alignment eye was checked with a laser level:
John
-
bartley got a reaction from ccoyle in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 69: Installation of the Topmast Yard
The first task was to attach the truss, which was seized around the mast to hold the yard in place. Attachment of the halyard was straightforward. A hook was seized to a length of 0.63 mm rope which was attached to the sling.
It was then led down to a tackle on the starboard side which was an exact mirror image of the topping lift tackle on the port side:
Aligning the yard proved more difficult than I thought. First I fitted the clue lines and sheets since these were the inner ropes. I then used the tension on these to establish the correct angle for the yard. However since these also connect to the main yard tenshioning of these caused movement of both yards.
So in the end I left these slack while I adjusted the angle with the lifts and braces and the re-tenshioned the sheets and clue lines quite loosely later.
My alignment eye was checked with a laser level:
John
-
bartley got a reaction from thibaultron in wipe-on poly or other final wood treatment education request
I have made fine furniture for many years and have used both, On open grained timbers wipe-on-poly can look quite good if you wipe it off quickly and it is very durable so it is good on surfaces which will be subjected to wear and tear. However, in my opinion, there is no comparison to the patina of shellac. As someone else said, it becomes richer over the years. It is, after all, French Polish although you could not apply that technique to a model. In fact when I apply shellac to a model I wipe it off quickly just like you would with wipe-on-poly,
If you do a side-by-side test on whatever timber you are using you will probably not see much difference. I t will only be when you look at it a year or so later that you will start to see the difference.
John
-
bartley got a reaction from thibaultron in wipe-on poly or other final wood treatment education request
Shellac for me as well. I don't like the "synthetic" look of wipe on poly.
John
-
bartley got a reaction from Ryland Craze in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Thanks, oldmate. Yes I have been a bit on-and-off on mine. Other hobbies. Other builds even. But you should persist. It's a great build. For me, lots of challenges. But all can be overcome and very satisfying then.
Cheers,
John
-
bartley got a reaction from Canute in wipe-on poly or other final wood treatment education request
I have made fine furniture for many years and have used both, On open grained timbers wipe-on-poly can look quite good if you wipe it off quickly and it is very durable so it is good on surfaces which will be subjected to wear and tear. However, in my opinion, there is no comparison to the patina of shellac. As someone else said, it becomes richer over the years. It is, after all, French Polish although you could not apply that technique to a model. In fact when I apply shellac to a model I wipe it off quickly just like you would with wipe-on-poly,
If you do a side-by-side test on whatever timber you are using you will probably not see much difference. I t will only be when you look at it a year or so later that you will start to see the difference.
John
-
bartley got a reaction from Canute in wipe-on poly or other final wood treatment education request
Shellac for me as well. I don't like the "synthetic" look of wipe on poly.
John
-
bartley got a reaction from mtaylor in wipe-on poly or other final wood treatment education request
I have made fine furniture for many years and have used both, On open grained timbers wipe-on-poly can look quite good if you wipe it off quickly and it is very durable so it is good on surfaces which will be subjected to wear and tear. However, in my opinion, there is no comparison to the patina of shellac. As someone else said, it becomes richer over the years. It is, after all, French Polish although you could not apply that technique to a model. In fact when I apply shellac to a model I wipe it off quickly just like you would with wipe-on-poly,
If you do a side-by-side test on whatever timber you are using you will probably not see much difference. I t will only be when you look at it a year or so later that you will start to see the difference.
John
-
(1)(1)(1)(2).thumb.jpg.792ad774561d3d4f35888704cde27a8e.jpg)
bartley got a reaction from PRS in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 69: Installation of the Topmast Yard
The first task was to attach the truss, which was seized around the mast to hold the yard in place. Attachment of the halyard was straightforward. A hook was seized to a length of 0.63 mm rope which was attached to the sling.
It was then led down to a tackle on the starboard side which was an exact mirror image of the topping lift tackle on the port side:
Aligning the yard proved more difficult than I thought. First I fitted the clue lines and sheets since these were the inner ropes. I then used the tension on these to establish the correct angle for the yard. However since these also connect to the main yard tenshioning of these caused movement of both yards.
So in the end I left these slack while I adjusted the angle with the lifts and braces and the re-tenshioned the sheets and clue lines quite loosely later.
My alignment eye was checked with a laser level:
John
-
bartley got a reaction from JpR62 in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 69: Installation of the Topmast Yard
The first task was to attach the truss, which was seized around the mast to hold the yard in place. Attachment of the halyard was straightforward. A hook was seized to a length of 0.63 mm rope which was attached to the sling.
It was then led down to a tackle on the starboard side which was an exact mirror image of the topping lift tackle on the port side:
Aligning the yard proved more difficult than I thought. First I fitted the clue lines and sheets since these were the inner ropes. I then used the tension on these to establish the correct angle for the yard. However since these also connect to the main yard tenshioning of these caused movement of both yards.
So in the end I left these slack while I adjusted the angle with the lifts and braces and the re-tenshioned the sheets and clue lines quite loosely later.
My alignment eye was checked with a laser level:
John
-
bartley got a reaction from Ryland Craze in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 69: Installation of the Topmast Yard
The first task was to attach the truss, which was seized around the mast to hold the yard in place. Attachment of the halyard was straightforward. A hook was seized to a length of 0.63 mm rope which was attached to the sling.
It was then led down to a tackle on the starboard side which was an exact mirror image of the topping lift tackle on the port side:
Aligning the yard proved more difficult than I thought. First I fitted the clue lines and sheets since these were the inner ropes. I then used the tension on these to establish the correct angle for the yard. However since these also connect to the main yard tenshioning of these caused movement of both yards.
So in the end I left these slack while I adjusted the angle with the lifts and braces and the re-tenshioned the sheets and clue lines quite loosely later.
My alignment eye was checked with a laser level:
John
-
bartley got a reaction from CiscoH in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 68: Installing the Main Yard
I have spent some time doing a final tidy up some of the belayed lines and trimming them off. Now it is time to install the main yard which was constructed some time ago. In principal the lifts control the vertical tilt and the braces the for and aft tilt. However, because the braces exert a downwards force I found that they really control both movements. I initially squared up everyting by eye but the laser showed I was a little off and helped me to be more precise:
On the whole I am pretty happy with the way it looks but nothing is tied off permanently just yet and obviously the lifts are yet to be belayed.
John
-
bartley got a reaction from GrandpaPhil in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 68: Installing the Main Yard
I have spent some time doing a final tidy up some of the belayed lines and trimming them off. Now it is time to install the main yard which was constructed some time ago. In principal the lifts control the vertical tilt and the braces the for and aft tilt. However, because the braces exert a downwards force I found that they really control both movements. I initially squared up everyting by eye but the laser showed I was a little off and helped me to be more precise:
On the whole I am pretty happy with the way it looks but nothing is tied off permanently just yet and obviously the lifts are yet to be belayed.
John
-
bartley got a reaction from JpR62 in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 68: Installing the Main Yard
I have spent some time doing a final tidy up some of the belayed lines and trimming them off. Now it is time to install the main yard which was constructed some time ago. In principal the lifts control the vertical tilt and the braces the for and aft tilt. However, because the braces exert a downwards force I found that they really control both movements. I initially squared up everyting by eye but the laser showed I was a little off and helped me to be more precise:
On the whole I am pretty happy with the way it looks but nothing is tied off permanently just yet and obviously the lifts are yet to be belayed.
John
-
bartley got a reaction from PRS in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 68: Installing the Main Yard
I have spent some time doing a final tidy up some of the belayed lines and trimming them off. Now it is time to install the main yard which was constructed some time ago. In principal the lifts control the vertical tilt and the braces the for and aft tilt. However, because the braces exert a downwards force I found that they really control both movements. I initially squared up everyting by eye but the laser showed I was a little off and helped me to be more precise:
On the whole I am pretty happy with the way it looks but nothing is tied off permanently just yet and obviously the lifts are yet to be belayed.
John
-
bartley got a reaction from dodgeyhack in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 68: Installing the Main Yard
I have spent some time doing a final tidy up some of the belayed lines and trimming them off. Now it is time to install the main yard which was constructed some time ago. In principal the lifts control the vertical tilt and the braces the for and aft tilt. However, because the braces exert a downwards force I found that they really control both movements. I initially squared up everyting by eye but the laser showed I was a little off and helped me to be more precise:
On the whole I am pretty happy with the way it looks but nothing is tied off permanently just yet and obviously the lifts are yet to be belayed.
John
-
bartley got a reaction from bruce d in HM Cutter Cheerful 1806 by bartley - FINISHED - 1/48 scale
Post 68: Installing the Main Yard
I have spent some time doing a final tidy up some of the belayed lines and trimming them off. Now it is time to install the main yard which was constructed some time ago. In principal the lifts control the vertical tilt and the braces the for and aft tilt. However, because the braces exert a downwards force I found that they really control both movements. I initially squared up everyting by eye but the laser showed I was a little off and helped me to be more precise:
On the whole I am pretty happy with the way it looks but nothing is tied off permanently just yet and obviously the lifts are yet to be belayed.
John
Our Emblem ®
