FAQ FAQ  Forum Search   Events   Register Register  Login Login

Eclipse filters

Author
Dena View Drop Down
Senior Member
Senior Member

Joined: 02 November 2015
Country: United States
Location: Arkansas
Status: Offline
Posts: 1112
Post Options Post Options   Quote Dena Quote  Post ReplyReply Direct Link To This Post Topic: Eclipse filters
    Posted: 23 December 2023 at 03:57
I live in the path of totality for the April, 2024 eclipse. I have a photo in mind for the totality. I've been looking for info about protective filters for the eclipse, and read it's not necessary to protect the sensor only during totality. Is this true? For other times, assuming an ND filter won't cut it. Thanks.
 



Back to Top
neilt3 View Drop Down
Senior Member
Senior Member

Joined: 13 September 2010
Country: United Kingdom
Location: Manchester.U.K
Status: Offline
Posts: 3381
Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 23 December 2023 at 11:43
If it's just a shot at totality your doing and the camera is handheld , being lifted up just at the point of totality , then that would be fine .

The last time we had an eclipse over here it was just under total , but I had the camera set up on a tripod ready as I wanted to take some shots as the Moon progressed passed the Sun .
As it's a fairly uncommon event I didn't want to restrict myself to just one shot .
I used a   Sony a77mk2 with a Minolta 300mm f/4 HS/APO G and a matched Minolta X2 teleconverter with a Astrozap Baader Solar filter attached .
Although mine might have been another firms filter as I paid less than a third of the current price . There again it was eight years ago .

If I hadn't used it with the sun focussed on the sensor it would certainly have done damage by over heating it .

You can buy the film on it's own for much less and either make your own holder out of stiff card or simply tape it to your lens with some masking tape .
Don't worry about it being a bit crinkled up , it won't effect the resulting images .
Baader AstraSolar safety film ND5

Incidentally , these aren't simple ND filters as used for photography .
Photography ones just reduce visible light to control shutter speed . They don't block out the infrared light that heats up your sensor etc .
Some state that the are infrared blocking and yes they are , to prevent shift on the photos , but they don't block the wavelength's that do damage to your eyes and sensor when pointed at the Sun .
These Solar filters blocks out that as well .

The filter I bought is big enough to use on one of my telescopes , so I hold it on the Minolta lens with a lump of foam !

Here's a shot of my set-up for the last Solar eclipse I shot , notice the sturdy tripod , usually used for medium and large format cameras !


Set-up
by Neil , on Flickr

When I got to where I would have a clear view and got set up it was lovely clear blue skies as far as the eye could see .
Being in a camper van , the next job was to put the kettle on for a cup of coffee and wait .
As the Moon arrived , so did the clouds ....at some times you couldn't dee the sun with the bare eye , but enough light got through for the camera to see what was happening .
But this did reduce detail .


#7 And then the cloud rolled in .
by Neil , on Flickr

This as far as it got that time .


#4
by Neil , on Flickr

Despite the cloud , I still managed to get some detail of the Suns surface , here's some Sun spots .
No not dust on the sensor !


#1 Sun Spot's and Eclipse
by Neil , on Flickr


A few years earlier I used this filter on another lens I had before I got the Minolta G lens .
It was a Sigma 170-500mm apo lens at 500mm with a generic 2 times and 1.4 times teleconverter stacked. This gives a focal length of 1400mm ( or a 2100mm effective focal length in 35mm terms ).
The sun spots are clearly visible . after stopping the lens down to f/10 , so were some dust spots too ! I think I edited most of these out.
The lens wasn't very good and stacking cheap teleconverters isn't a good idea , but at the time it's the best I could do .
This is a cropped image , so would be effectively about a 4000mm lens on the Sony a580 16mp sensor manually focussed .
But it's the first time I had seen Sun spots other than pictures someone else had taken .
But yes , I would recommend either buying a ready made filter if you intend using it again , or buying the £25 sheet and making or taping to your lens your own .
It'll give you the opportunity to take more shots to create a story , and try a few other things besides while your set up waiting for the eclipse .


Sun spots
by Neil , on Flickr


Edited by neilt3 - 23 December 2023 at 11:49
see my photostream on flickr;
http://www.flickr.com/photos/neilt3/
C & C welcome.
Back to Top
Dena View Drop Down
Senior Member
Senior Member

Joined: 02 November 2015
Country: United States
Location: Arkansas
Status: Offline
Posts: 1112
Post Options Post Options   Quote Dena Quote  Post ReplyReply Direct Link To This Post Posted: 25 December 2023 at 05:39
Thanks. I'll find one of these big ones. There is a huge oak tree that grows in the middle of the road near my home. I made a night photo of it with Orion overhead a few years back and now I want the eclipse over it. I believe the sun and moon will line up over it about the same as Orion did. I'm thinking this may be a few seconds exposure, so I'll play it safe and get the filter.
Back to Top
stiuskr View Drop Down
Moderator Group
Moderator Group

Joined: 01 September 2006
Country: United States
Location: West Virginia
Status: Offline
Posts: 11485
Post Options Post Options   Quote stiuskr Quote  Post ReplyReply Direct Link To This Post Posted: 01 January 2024 at 12:29
My tip is to take a second camera to video the solar snakes wiggling on the ground during totality. I travelled for the 2017 eclipse and it was awesome but seeing the snakes was unexpected but totally mesmerizing, kind of disorienting and for me the highlight of the trip.
Rob Suits Jr.
a99M2 a99 a77 a700 KM7D|Min24/2.8 Min35/2 So50/1.4 So50/2.8 Min85/1.4G Tam90/2.8 Tam180/3.5|Tam17-50 CZ24-70G2 KM28-75D So70-200G1 So70-300G So70-400G1| SonyF60 AD200R2
Back to Top
Dyxum main page >  Forum Home > Equipment forums > Other photographic topics

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.047 seconds.

Monitor calibration strip

Dyxum.com - Home of the alpha system photographer

In memory of Cameron Hill - brettania

Feel free to contact us if needed.