When do we need "sharpness"?

[ahaslett]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

 

[Guy Parsons]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

Quality of blur = bokeh

Quality of sharpness = fokeh

 

[ahaslett]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

Quality of blur = bokeh

Quality of sharpness = fokeh

I looked up “fokeh” and had a good laugh. Thanks Guy!

:-D

--
Infinite are the arguments of mages. Truth is a jewel with many facets. Ursula K LeGuin
Please feel free to edit any images that I post

 

[Guy Parsons]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

Quality of blur = bokeh

Quality of sharpness = fokeh

I looked up “fokeh” and had a good laugh. Thanks Guy!

:-D

Dammit, ignorant me thought that I was inventing a new word. Must go invent another word now.

Maybe quality of sharpness = sharpeh

 

[mostlyboringphotog]

"But that still does not give you the absolute judgement of what is a "marginal gain".

I couldn't agree more and if it came over as that I can only apologise, I was trying to make the point that there is always a balance between cost, weight and benefit and that has to be decided by each and every one of us, there are no absolutes in the game, just what works for the individual at the time.

What works for me now is totally different from what I was using 10 years ago, for a variety of reasons

I appreciate your reply and no apology is needed. I realize we all are having a friendly conversation on the topic we love: photography (and the gear ;-) )

I did enjoy your OP and what an achievement!!

 

[jalywol]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

Quality of blur = bokeh

Quality of sharpness = fokeh

I looked up “fokeh” and had a good laugh. Thanks Guy!

:-D

Dammit, ignorant me thought that I was inventing a new word. Must go invent another word now.

Maybe quality of sharpness = sharpeh

Well.....

Loading…

be.chewy.com

 

[Humansvillian]

I took this photo recently and it is going to cause heads to explode!!! Better put on your plastic rain gear and get masked up so you don't get the gore all over you!



Last month:

https://www.dpreview.com/forums/post/65624973

I like your accidental (grass?) photo better than my accidental foot photos.

• • Opportunity

by Edward Rowland Sill (1841-1887)

This I beheld, or dreamed it in a dream: —
There spread a cloud of dust along a plain;
And underneath the cloud, or in it, raged
A furious battle, and men yelled, and swords
Shocked upon swords and shields. A prince’s banner
Wavered, then staggered backward, hemmed by foes.

A craven hung along the battle’s edge,
And thought, “Had I a sword of keener steel —
That blue blade that the king’s son bears, — but this
Blunt thing!” — he snapt and flung it from his hand,
And lowering crept away and left the field.

Then came the king’s son, wounded, sore bestead,
And weaponless, and saw the broken sword,
Hilt-buried in the dry and trodden sand,
And ran and snatched it, and with battle-shout
Lifted afresh, he hewed his enemy down,
And saved a great cause that heroic day.

--
Humansville is a town in the Missouri Ozarks

 

[Brian Wadie]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

Thanks Andrew I was hoping no one would ask that question as I was struggling with it myself which is partly why I started the thread

I think Peter may have come closest to answering it:

"Of course the optical performance of a lens is only effective if the lens is optimally focused on the subject AND the shutter speed is adequate to minimise motion blurring due to subject or camera motion."

so for me its a combination of getting the focus both precisely located on the point(s) of interest and accurately focused no back or front focus) with shutter speed high enough that there is no loss of detail from shutter blur or shake (unless intended for a specific purpose)

In addition there is then the question of out of focus blur, do I want everything in sharp focus or do I want just the point of interest detailed.

in this shot I was trying to record the detail of two False Oil beetles fighting for dominance to mate with a nearby female











--
So much to learn, so little time left to do it!

 

[ahaslett]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

Thanks Andrew I was hoping no one would ask that question as I was struggling with it myself which is partly why I started the thread

I think Peter may have come closest to answering it:

"Of course the optical performance of a lens is only effective if the lens is optimally focused on the subject AND the shutter speed is adequate to minimise motion blurring due to subject or camera motion."

so for me its a combination of getting the focus both precisely located on the point(s) of interest and accurately focused no back or front focus) with shutter speed high enough that there is no loss of detail from shutter blur or shake (unless intended for a specific purpose)

In addition there is then the question of out of focus blur, do I want everything in sharp focus or do I want just the point of interest detailed.

in this shot I was trying to record the detail of two False Oil beetles fighting for dominance to mate with a nearby female

Thanks Brian, useful example.

Andrew

--
Infinite are the arguments of mages. Truth is a jewel with many facets. Ursula K LeGuin
Please feel free to edit any images that I post

 

[Brian Wadie]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

Thanks Andrew I was hoping no one would ask that question as I was struggling with it myself which is partly why I started the thread

I think Peter may have come closest to answering it:

"Of course the optical performance of a lens is only effective if the lens is optimally focused on the subject AND the shutter speed is adequate to minimise motion blurring due to subject or camera motion."

so for me its a combination of getting the focus both precisely located on the point(s) of interest and accurately focused no back or front focus) with shutter speed high enough that there is no loss of detail from shutter blur or shake (unless intended for a specific purpose)

In addition there is then the question of out of focus blur, do I want everything in sharp focus or do I want just the point of interest detailed.

in this shot I was trying to record the detail of two False Oil beetles fighting for dominance to mate with a nearby female

Thanks Brian, useful example.

Andrew

sorry, I was going to remove it because on my screen DPR has done the usual job of taking what looks fine on my large 4k screen and making a complete mess of it. Thanks for taking time to look at it and commenting


this may be a little better as it is a smaller image to start with, face view of the same species, one of my favourite subjects, trying to focus on the eye and jaws. Its also shot with an Olympus

--
So much to learn, so little time left to do it!

 

[Brian Wadie]

I'm proud of these, not because I shot them but my 13 year old Grandson using his first camera that I gave him for his birthday and on his first studio shoot, after 15 minutes of tuition

The plastic fantastic 40-150 R in action



















--
So much to learn, so little time left to do it!

 

[Brian Wadie]

at another extreme

this was all about getting the settings right and knowing the rider's style then waiting for the moment (this lad who sails off our local beach was 4th in the world Freestyle championships a few years back)








and this was about capturing a unique moment at RIAT the last time Vulcan flew there



-
So much to learn, so little time left to do it!

 

[paul cool]

at another extreme

this was all about getting the settings right and knowing the rider's style then waiting for the moment (this lad who sails off our local beach was 4th in the world Freestyle championships a few years back)




and this was about capturing a unique moment at RIAT the last time Vulcan flew there

-
So much to learn, so little time left to do it!

What a plane the vulcan is brian ,recognise those amazonian red eyed frogs myles our little mouse keeper,have you returned to olympus and given up on your canon r6 or still using both?

--

Paul Stuart

Explore Paul Stuart’s 7,232 photos on Flickr!

www.flickr.com

 

[Brian Wadie]

"What a plane the vulcan is brian ,recognise those amazonian red eyed frogs myles our little mouse keeper,have you returned to olympus and given up on your canon r6 or still using both?"

Yep, I booked a private session with Miles for my grandson to shoot the frogs and even took a few shots with my set-up too

I have given up the canon kit and just use the light olympus options (can't even handle the weight of the Oly 100-400 now) and still have the sony rx10-4

If I had known how weak I was going to end up I wouldn't have messed about trying the canon system, in my excuse, the drugs I was on messed with my mind as well as my body ;-)

 

[paul cool]

"What a plane the vulcan is brian ,recognise those amazonian red eyed frogs myles our little mouse keeper,have you returned to olympus and given up on your canon r6 or still using both?"

Yep, I booked a private session with Miles for my grandson to shoot the frogs and even took a few shots with my set-up too

I have given up the canon kit and just use the light olympus options (can't even handle the weight of the Oly 100-400 now) and still have the sony rx10-4

If I had known how weak I was going to end up I wouldn't have messed about trying the canon system, in my excuse, the drugs I was on messed with my mind as well as my body ;-)

The same has happened to roger think you/he had contact ,not in great health either and very disabled can not stand up now it has got that bad ,his lightweight choice is the a6600 and 70-350mm think he likes extracting stills from 4k .A case of do what you can why you can ,you really have to factor weight in to the equation as you get older ,and if i had underlying health difficulties a lightweight system would be of up most importance .Take it easy brian , have a good festive christmas and new year.

 

[Brian Wadie]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

Quality of blur = bokeh

Quality of sharpness = fokeh

I looked up “fokeh” and had a good laugh. Thanks Guy!

:-D

Dammit, ignorant me thought that I was inventing a new word. Must go invent another word now.

Maybe quality of sharpness = sharpeh

Well.....

https://be.chewy.com/dog-breed/shar-pei/

can I offer "Okeh", its when you look at the image and think, hmm, that's not too bad :-D

 

[ahaslett]

Brian

My answer would be the same as a number of others - to the extent it’s important to the composition and planned viewing conditions.

Could you maybe say something about what image qualities you mean by “sharpness”. We have bokeh to describe the nature of out of focus parts of the image, but what about the parts in critical focus?

Andrew

Quality of blur = bokeh

Quality of sharpness = fokeh

I looked up “fokeh” and had a good laugh. Thanks Guy!

:-D

Dammit, ignorant me thought that I was inventing a new word. Must go invent another word now.

Maybe quality of sharpness = sharpeh

Well.....

https://be.chewy.com/dog-breed/shar-pei/

can I offer "Okeh", its when you look at the image and think, hmm, that's not too bad :-D

That’s the one!

Since you have been so generous with your examples, here are a couple where the okeh is where I wanted it in my latest obession.




Lovers & Lighthouse 1




Lovers & Lighthouse 2

Andrew

--
Infinite are the arguments of mages. Truth is a jewel with many facets. Ursula K LeGuin
Please feel free to edit any images that I post

 

[Brian Wadie]

then of course there are the obligatory landscape shots, usually taken when on a coach trip so travelling light with no tripod




The Garden House Dartmoor, one of my best selling landscapes




a quick passing storm over Portland, another top seller



--
So much to learn, so little time left to do it!

 

[Brian Wadie]

and then some of my favourite sporting moments































--
So much to learn, so little time left to do it!

 

[Brian Wadie]

and finally, as you are probably bored by now :-D

A throw back to one of my R&D projects from the 70s, looking at the influence of structure of bubbles on the behaviour of materials, this time for fun and to provide tuition for others in my camera club (using soap solution, lesson 1, blow don't suck! )


a very small segment of the intersection between the faces of a dodecahedral bubble showing the struts and membranes with the fluid flow within the membrane. The colours are natural, being formed by refraction of light passing through the thinning membrane


another interaction between strut and membranes, this time the struts are more curved (bubble size is around 1/4 inch)

[ATTACH alt="A 4" bubble this time showing the effect of convection on structure and film thickness, the red is thicker and the blue thinner with the black spots showing where the soap is deleted. One of these will be the point at which the surface fails and the bubble bursts (the image was a good seller too )"]3073564[/ATTACH]
A 4" bubble this time showing the effect of convection on structure and film thickness, the red is thicker and the blue thinner with the black spots showing where the soap is deleted. One of these will be the point at which the surface fails and the bubble bursts (the image was a good seller too )

--
So much to learn, so little time left to do it!