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Mar 10, 2020 09:03:53   #
Since the introduction of IOS/ IPados 13
Things have got easier with the iPad, if yours has usb-c much easier as its usually plug and play but the lightning port iPads are a little harder since the port usually doesn't provide much power for external devices.

you need
https://www.apple.com/ie/shop/product/MK0W2ZM/A/lightning-to-usb-3-camera-adapter
A Powered usb hub
A Drive
A card reader
maybe a USB battery bank.
Possibly a sata to usb3 adapter

essentially plug the apple lightning to usb3 adapter into the ipad plug the usb3 hub into that supply power to that usually this needs a micro usb lead which can be plugged into the ipad power brick or maybe a usb battery pack. plug the card reader, and drive into the usb hub

use the files app to transfer from the card to the drive.

If you have an iPad with usb-C then you can just plugin a usbC hub and it should provide enough power.

Cheapest solid state drive is probably a 1TB 2.5" internal, which can be adapted with a sata to usb3 adapter cable. Ok you can buy an external SSD which is already usb3 but usually it's a lot smaller capacity or costs more.

There are a lot of variations on this theme e.g i have a powered usb dock which takes 2 sata drives and has a built in card reader and a couple more usb3 ports it does require 12 volts usually from a wall wart.

However this https://www.amazon.co.uk/gp/product/B01I4JJ6IK adapts a Sony NP-F970 F750 F550 Battery to 12 volts I use it as an external battery for a BMPCC camera but it has a lead which provides 12 volts to larger drives, Docks or my sata to usb3 adapter. For charging the Sony batteries i have a dual charger which takes in 5 volts via a micro usb cable.

Anyway lots of options available
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Mar 10, 2020 07:49:06   #
If you want a problem try unsplash.com
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Mar 10, 2020 07:34:44   #
gigabits per second
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Mar 10, 2020 04:09:25   #
Fungus can be cleaned off, and it does ruin glass etching it. Some lenses are easier to clean than others, some may need an optical workbench to ensure the elements go back in the optimal position. Fungus can spread to other lenses. You may want to find if there is a guide for disassembly and cleaning that particular lens.
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Mar 10, 2020 02:23:35   #
3.0 is the same as 3.1 gen1 , 3.1 gen2 is double the max speed of 3.0 /3.1 gen1. The type A ports are all backwards compatible.

usb-c is a connector which can do more than the type A connector (including power delivery upto 100 Watts) It doesn't have to do everything that it supports. For example I have a usb-c SSD drive it comes with a cable with 2 usb-c ports and a converter which goes from usb-c to USB A in theory without that converter the max data speed is 10GPS but in practice the SSD can't go faster than 5GPS anyway.

For your purposes 3.0/3.1 gen1 /gen2 usb-c doesn't matter.
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Mar 10, 2020 01:45:59   #
If you have an iphone running ios 13.x there is now the files app.
In addition to your iphone and charger you would need apples camera connection kit, a powered usb3 hub, a usb sd card reader (might be built into the hub) a hard drive (an SSD may be more robust and use less power) a lead for powering the hub (usually micro usb).

Once these are connected together just use the files app to transfer from the card to the drive.
There are a number of variations on this if you have your camera's usb lead you can transfer from the camera without an sd card reader.
If you have a bare Sata SSD drive you can get a cable to convert to USB mine has a 12 volt jack which can take the usual 12 volt wall wart

But I have a battery plate for my Blackmagic Pocket cinema camera which uses a Sony Battery 7.8volt which outputs 12 volt which lets me run a bare 3.5" HDD as a portable drive. You can just use it as battery power for a 3.5" external cased drive. Funny enough the charger i use for the Sony batteries is 5 volt usb.
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Feb 25, 2020 19:08:44   #
PhotogHobbyist wrote:
A 1.5 crop factor means the crop sensor is 2/3 the size of the FF or the FF is 1.5 times larger not 2.25 times as the 4/9 would indicate. That would be calculated by 36/3 = 12 and 12X2 = 24 MP, not 16.


ok look at it this way full frame is 24 x 36 and crop is 16 x 24 16 is 2/3rds of 24 and 24 is 2/3rds of 36. So if you divide a full frame image into 9 and put the apc frame in the bottom left corner you would lose 3 of the boxes along the top and 2 along the right side. so what is left is 4/9ths 1/9th of 36 is 4 so 4/9ths is 16Mpix. I could draw a picture but this should be easy enough to visualise. Its not quite 100% accurate a digital full frame is usually a little bit smaller than 24x36 but its close enough.

When you are cropping on a crop with the 200mm lets say you can do it separate or combined (1.5x 1.5 = 2.25)

so a 200mm lens on aps C has a field of view of a 300mm if you crop again it's 300x 1.5 or 450mm
combining both crops is 2.25 2x 200 = 400 and .25 is a 1/4 of 200 or 50 = 450mm again.

Think i got the 2x teleconverter wrong though
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Feb 25, 2020 01:45:55   #
a6k wrote:
Using tags on a set of selected files is easy and I do it when it is suitable. But "comments" does not seem to work that way. Am I missing something? I should have been clearer as to what works and what does not.


Bulk comments in the comments field
Tags are better than comments for a metaview as they can provide a view from where ever they are in a single finder window pretty much instantly. but adding this service will allow you to add comments in the comment field in bulk. The info pane holds quite a lot, see the 2nd attachment.

https://www.thegraphicmac.com/easily-add-spotlight-comments-to-files-in-mac-os-x-finder/

https://sourceforge.net/projects/addspotlightcom/

See also
https://www.macobserver.com/tips/how-to/macos-enhance-mac-file-search-file-comments/

6 files all with the same comment using add spotlight comment service

(Download)

This info is for a photo downloaded from here (i was looking for the metadata) note the where from field

(Download)
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Feb 25, 2020 00:47:29   #
3000 x 2400 = 7.2MB around the 8MB mark.
if you split the photo into thirds and use 4 of the 9 thirds(1.5x crop) (4/9 = 0.44) *24MPix = 10.66MP
cropping into 1/4s (2x crop)would be 6Mpix a bit too low really. and using 1/9th (3x crop) would be about 2.6MB of the 24MB.
I like these crops as they are easy to visualise.
They also help figure out better focal lengths to use.
since this photo was taken with a 200mm lens with about a 1.5x crop factor you can multiply the crops to get the lenses you could have used.
1.5 x 1.5 = 2.25 x 200mm = 450mm (as 200mm with 1.5 crop gives 300mm you could just multiply 300 x 1.5 and get the same answer)
so that 4/9ths view would be a 300mm lens on the d80
the 1/4 crop (2x) = 600mm (400mm on a D80)
and the 1/9th crop (3x) = 900mm (600mm on a D80)
So to fill the frame with the crop that was wanted around a 600mm lens at that distance is what was needed.
If you wanted to crop (and a 4/9ths crop is about as much as you would want to use)
that would be a 400mm lens.
I guess you might try a 2x teleconverter (losing 2 stops of light) on the 200mm lens and maybe get the crop desired but a 2x teleconverter would probably lower the IQ too much.
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Feb 24, 2020 18:42:05   #
I use a 36Mpix full frame camera, an APC (1.5x crop) is 4/9ths 36/9 x 4 =16Mpix a mirrorless camera sensor (2x crop) is a 1/4 of mine 36/4 = 9Mpix These are reasonable crops. 3x crop factor = 1/9th or 4Mpix = not enough.

I think it was gene first said to me 8Mpix is enough for an 8x10ish sized print. at a normal viewing position and you can go bigger at that size because the viewing distance increases.

Try that calculation on your camera, I know if that was from mine i wouldn't use less than a 1/4 of the frame.
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Feb 24, 2020 17:06:32   #
camerapapi wrote:
I do not agree with Bryan Peterson. Use AUTO white balance. If using RAW data work at leisure with colors with your editor.


Auto white balance for a sunset, have you tried it? Your camera should do its best to remove the colors from the sunset.
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Feb 24, 2020 16:53:16   #
rehess wrote:
More to the point, right clicking is very useful - except to Apple with their one button mouse.


The first mice in 1979 were single button for a very good reason,the three button Xerox mouse cost over US$400 to build, which was not practical for a consumer-based personal computer. Apple commissioned Hovey-Kelley Design (which later became IDEO) to assist them with the mouse design, which not only had to be redesigned to cost US$25 instead of US$400, but also needed to be tested with real consumers outside a laboratory setting to learn how people were willing to use it.

There are quite a few apple designed mice. The magic mouse is quite nice it has a capacitive scroll vertical and horizontal as well as mouse buttons which don't have switches on top. you just choose which side to press. Single button mice haven't been a feature in at least 15 years.

You can use any usb or bluetooth or wireless mouse with a mac.
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Feb 24, 2020 16:31:31   #
a6k wrote:
I have. I use only OSX for myself. I was teaching Windows because that is what the students needed. My wife uses Windows.

In almost every way, for me, OSX is superior. But on this one thing, I think Windows does it better. If there is a way to edit those fields for a multi-select in OSX then I would like to know how. Yes, easy on one file at a time.

Just to clarify, I'm referring to the OS itself, not the Photos app which I don't like or use. I'm comparing to the file manager in Windows; tomatoes to tomatoes.
I have. I use only OSX for myself. I was teaching ... (show quote)


Here is a screen grab of the finder

6 files selected and tagged using the tag button top right

(Download)
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Feb 24, 2020 05:19:16   #
a6k wrote:
When I was teaching Windows to seasoned citizens that was something that I showed them because it was very useful for cataloging photos when it's hard to decide whether to put them in a folder for the event such as Christmas or Wedding, the subject such as son, daughter, grandkid, etc. or - and this is the hardest - multiple subjects such as both or all 3 kids, etc.

But using global meta-data like that the problem is easy to solve because Windows can efficiently search on those data items across folder chains or branches (more of a problem with multiple volumes but my students were not at that level, usually).

As much as I am a Mac fanboy, Windows does this better. Enjoy it,
When I was teaching Windows to seasoned citizens t... (show quote)


You have never used Tags or comments in OSX have you?
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Feb 22, 2020 22:29:09   #
lamiaceae wrote:
Was there something new here, in this video? I watched the entire thing. It is all stuff I know or have heard before. I fully agree with 90+ % of it.

I pretty much shoot RAW in my DSLRs. And for snap shots, shoot JPGs in my SmartPhone (even though it is capable of shooting in RAW). For the majority of my images I have my (RAW) workflow fairly standardized and I am able to process an image fast that the "speed" or "effort" issue for JPGs is not existent for me. I'm pretty quick even with the ACR of Photoshop (I don't use Lr). Yes, occasionally I'l get an image I spend hours or days processing, but then if it were not shot in RAW I probably would not get a useful result.
Was there something new here, in this video? I wat... (show quote)


The new bit was it was balanced, there are valid reasons to choose different options for different photographs.
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